Answers
b. Reject the claim that the mean weight is 14 oz when it is actually 14 oz is the type i error for the test. a cereal company claims that the mean weight of the cereal in its packets is 14 oz.
Cereal, which is officially known as breakfast cereal, is a common morning meal produced from refined cereal grains. It is typically consumed as part of breakfast. As opposed to other morning cereals, shredded whole wheat cereal with low-fat milk is the greatest option because it has a high fibre content and doesn't have any added sugar or salt. But include a protein-rich cereal in your daily diet will benefit your muscles, skin, cartilage, bones, and blood in addition to other body tissues. The likelihood that you will have cravings for sweet or fatty foods later in the day decreases if you consume cereal in the morning.
Learn more about cereal here:
https://brainly.com/question/12996351
#SPJ4
Related Questions
why ionic compound are good conduct of electricity in their molten state ??
Answers
Answer:
Ionic compounds conduct electricity when molten (liquid) or in aqueous solution (dissolved in water), because their ions are free to move from place to place. Ionic compounds cannot conduct electricity when solid, as their ions are held in fixed positions and cannot move.
Explanation:
because their ions are free to move from place to place.
Titanium has an HCP unit cell for which the ratio of the lattice parameters c/a is 1.58. If the radius of the Ti atom is 0.1445 nm, (a) determine the unit cell volume, and (b) calculate the density of Ti and compare it with the literature value
Answers
The unit cell volume of the crystal is \(V_c = 9.9084*10^-^2^3 cm^3 / unit cell\) and the density of titanium is calculated as 4.71g/cm^3 while the literature value is 4.5 g/cm^3
Data;
radius = 0.1445 nmc/a = 1.58A = 46.88 g/molUnit Cell VolumeThe unit cell volume can be calculated as
\(V_c = 6R^2c\sqrt{3}\\\)
let's substitute the values into the formula
\(V_c = 6 * (1.445*10^-^8)^2 * 1.58 8 * a * \sqrt{3} \\a = 2R\\V_c = 6 * (1.445*10^-^8)^2 * 1.58* 2 * 1.445*10^-^8 * \sqrt{3}\\ V_c = 9.984*10^-^2^3 cm^3 / unit cell\)
The unit cell volume of the crystal is \(V_c = 9.9084*10^-^2^3 cm^3 / unit cell\)
Density of TiThe density of titanium can be calculated as
\(\rho = \frac{nA}{V_c N_a}\)
n = 6 for hcpA = 46.88 g/molNa = Avogadro's numberlet's substitute the values into the formula
\(\rho = \frac{nA}{V_c Na}\\ \rho = \frac{6*46.88}{9.9084*10^-^2^3* 6.023*10^2^3} \\\rho = 4.71 g/cm^3\)
The density of titanium is calculated as 4.71g/cm^3 while the literature value is 4.5 g/cm^3
Learn more on crystal lattice here;
https://brainly.com/question/6610542
How would a descriptive model of Earth's layers be categorized?
a. abstract model
b. prototype model
c. concrete model
d. conceptual model
Answers
A descriptive model of Earth's layers can be categorized as prototype model. Hence, option B is correct.
What is a descriptive model?
A descriptive model describes a system or other entity and its relationship to its environment.
The Earth has different compositional and mechanical layers. Compositional layers are determined by their components, while mechanical layers are determined by their physical properties.
The outermost solid layer of a rocky planet or natural satellite. Chemically distinct from the underlying mantle.
Hence, option B is correct.
Learn more about descriptive model here:
https://brainly.com/question/16988456
#SPJ2
The Sun has been shining on this swimming pool all day. The water is much warmer than it was in the morning. Describe what is happening to the water in terms of temperature, particle speed, and kinetic energy.
Answers
Answer:
The waters' temp increased
Explanation:
The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.
A scientist uses a scale of wind speed and barometric pressure to determine the category of a hurricane. According to the data in the table provided, as the barometric pressure continues to fall, the wind speed will
Answers
Whats the question??????????????????/
atomic size of an atom is decided by_________
Answers
Answer:
The edge of its orbital
Explanation:
The size of an atom is defined by the edge of its orbital. However, orbital boundaries are fuzzy and in fact are variable under different conditions
I need ASAP! When particles are enclosed in a vesicle and released OUT of a cell, the process is called:
A
Osmosis
B
Diffusion
C
Endocytosis
D
Exocytosis
Answers
Answer:D Diffusion
Explanation:
Because the the cell Is letting it go diffuse it to remove it.
Which of the three goals of Persuasive Speaking is the hardest to achieve?
a.
weaken attitudes, beliefs or values
b.
strengthen attitudes, beliefs or values
c.
change attitudes, beliefs, or values
d.
motivate to action
Answers
Answer:
C
Explanation:
edge2021!!
Answer: The correct answer is c. change attitudes, beliefs or values.
Explanation:
Of these goals, the hardest to achieve is changing attitudes, beliefs, and values. It is difficult to convince an audience to truly change their attitudes, beliefs, or values based on your presentation since it typically requires establishing trust and respect on a personal level.
Trypsin and pepsin are both enzymes in the digestive system which catalyze the breakdown of proteins in food into smaller peptide
chains or into individual amino acids. However, like other enzymes, they differ in their substrate and optimal conditions. Analyze the
graph and select ALL of the statements that accurately describe the action of trypsin and pepsin.
A)
Trypsin has an optimal pH of 8.
B)
Pepsin works best at a pH of 3.
Both enzymes have an optimal pH of 7
D)
Pepsin works best in more acidic conditions.
E)
Trypsin works best in more acidic conditions,
Answers
Answer:
A) Trypsin has an optimal pH of 8.
B) Pepsin works best at a pH of 3.
D) Pepsin works best in more acidic conditions.
The statements that accurately describe the action of trypsin and pepsin are as follows:
Trypsin has an optimal pH of 8.Pepsin works best at a pH of 3.Pepsin works best in more acidic conditions.Thus, the correct options for this question are A, B, and D.
What are Enzymes?Enzymes may be defined as the types of biocatalysts that significantly increase the rate of chemical reactions without being consumed in the overall process. It is thought that all cellular processes and reactions are mediated by enzymes.
Both trypsin and pepsin are the classes of enzymes that effectively catalyze the breakdown of proteins in food into smaller peptide chains or into individual amino acids.
But the mode of action for both enzymes may differ a lot. For example, trypsin work best at a slightly basic condition of pH 8 while pepsin works best in an acidic environment.
Therefore, the correct options for this question are A, B, and D.
To learn more about Enzymes, refer to the link:
https://brainly.com/question/1596855
#SPJ5
What is the wavelength of green light (in nm) with a frequency of 5.98 x 1014 s-1?
A) 5.02 x 10-7 nm
B) 1.99 x 10-6 nm
C) 502 nm
D) 545 nm
E) 5.45 x 10-7 nm
Answers
Answer:
502nm
Explanation:
wavelength=3×10^7/5.98×19^14
Imagine that scientists have just discovered a non-bird dinosaur skeleton. They want to know whether the dinosaur was closely related to birds. What features in ...
might help them decide?
Answers
Answer:
This evidence includes fossilized bones, teeth, eggs, footprints, teeth marks, and even dung. When paleontologists compare a skeleton of a living bird to the fossilized skeleton of a non-bird theropod, like Sinornithosaurus, they see many similarities.
Explanation:
Answer:
When people think of dinosaurs, two types generally come to mind. There were the huge herbivores,
like Apatosaurus, with their small heads and long tails. There were also those fearsome carnivores,
like Tyrannosaurus rex, that walked on two legs and had a mouthful of teeth like kitchen knives.
Living Dinosaurs
These large dinosaurs are no longer around, but dinosaurs still live among us today. They are the
birds. It's difficult to imagine that a bird on your window sill and a T. rex have anything in common.
One weighs less than a pound. The other was the size of a school bus, tipping the scales at eight
tons. But for all their differences, the two are more similar than you might think. In fact, birds and T.
rex are close relatives. They all belong to a group of dinosaurs called theropods.
This is a cladogram, a "" showing the relationships among organisms. The group called dinosaurs includes the extinct dinosaurs
and all their living descendants. All its members, including living birds, descended from the very first dinosaur-their common ancestor.
That's why birds are a kind of dinosaur (just as humans are a kind of primate).
Skeletal Evidence
When paleontologists compare a skeleton of a living bird to the
fossilized skeleton of a non-bird theropod, like Sinornithosaurus,
they see many similarities. They both have a hole in the hipbone, a
feature that distinguishes most dinosaurs from all other animals.
This feature allows an animal to stand erect, with its legs directly
beneath its body. All theropod dinosaurs, including birds, have a
furcula, also known as a wishbone. Another shared characteristic is the presence of hollow bones.
Hollow bones reduce the weight carried by an animal. This feature enables the animal to run faster. It
probably also played a role in the evolution of flight.
thought to have evolved for flight. The discovery of more and more non-flying dinosaurs with feathers
disproved that explanation. For these dinosaurs, feathers may have served other functions, like
gliding, insulation, protection, and display. Feathers play that same role in many bird species today.
Based on the evidence of shared characteristics, scientists have concluded that birds are a type of
Birds are the only dinosaurs with the ability to fly. This is
very interesting to scientists who want to know when the
capability of flight emerged. To find out, some scientists
study the brains of bird and non-bird dinosaurs. Soft
tissue, such as brains, is almost never preserved in the
fossil record. What is preserved is the imprint the brain
left on the inside of the skull. Now scientists are using
computed tomography (CT) scanners to create
endocasts. These are detailed, three-dimensional
reconstructions of the interiors of fossilized skulls.
In a recent study, researchers were able to peer inside
the braincases of more than two dozen specimens.
"Technology allows us to look inside these specimens
without destroying them," says Dr. Amy Balanoff, a
Museum research associate. "It's a non-destructive way
to basically slice up a dinosaur brain. We look inside and see what it can tell us about the evolution of
the brain within dinosaurs. Most of us grew up thinking that dinosaurs had tiny brains, but actually
some had really big brains."
The endocasts allow Balanoff and other researchers to
explore the outer shape of the brain in more detail. In
addition, the casts also provide new information about
the volume and shape of different regions of the brain.
For example, scientists looked at a detailed view of the
dinosaur cerebrum, a region of the brain related to
cognition and coordination. They found that this region
was very large in non-bird dinosaurs closely related to
birds. Dr. Balanoff's research suggests that these
dinosaurs developed big brains long before flight and that
these bigger brains prepared the way for them to fly.
When examining skeletal, behavioral, and brain
evidence, scientists see that birds and non-bird dinosaurs
share many features. This helped them conclude that
dinosaurs aren't extinct after all. They're living among us today.
(Im a really fast Typer and Thinker)
Have a nice day
Na S=0 N H N H2N Sulfadiazine pk, 6.3 Given the pka of sulfadiazine is 6.3, then what would be the ratio of sulfadiazine's (A-)[HA) in blood plasma with a pH = 7.4? Be sure to show your calculations. Edit View Insert Format Tools Table 12pt v Paragraph BIU A & Tv :
Answers
The ratio of A- to HA in blood plasma with a pH of 7.4 would be approximately 2.5119 : 1.
The dissociation reaction of sulfadiazine can be represented as follows:
HA ⇌ H+ + A-
Where HA represents the protonated form of sulfadiazine and A- represents the deprotonated form.
The pKa of sulfadiazine is given as 6.3. This means that at pH values below 6.3, sulfadiazine will predominantly exist in its protonated form (HA), while at pH values above 6.3, it will exist mostly in its deprotonated form (A-).
In blood plasma with a pH of 7.4, the ratio of A- to HA can be calculated using the Henderson-Hasselbalch equation:
pH = pKa + log([A-]/[HA])
Rearranging this equation, we get:
[A-]/[HA] = 10^(pH - pKa)
Substituting the values given:
[A-]/[HA] = 10^(7.4 - 6.3) = 2.5119
Therefore, the ratio of A- to HA in blood plasma with a pH of 7.4 would be approximately 2.5119 : 1.
Learn more about The ratio of sulfadiazine's:
https://brainly.com/question/29579985
#SPJ4
A researcher observes a reaction and gathers the data in the table below. Observations Mass decreased after reaction Energy is released during reaction New substance is formed Which piece of evidence best identifies they type of reaction as nuclear or chemical? 1. Chemical, because energy is released during the reaction. 2.Nuclear, because energy is released during the reaction. 3.Nuclear, because the mass decreased after the reaction. 4.Chemical, because a new substance is formed.
Answers
The piece of evidence that best identifies the type of reaction as nuclear or chemical is: Chemical, because a new substance is formed. Option 4
In this scenario, the observation that a new substance is formed is a key characteristic of a chemical reaction. Chemical reactions involve the rearrangement of atoms to form different substances with distinct properties. The formation of a new substance indicates a chemical change has occurred.
The other pieces of evidence listed do not necessarily point to a nuclear reaction:
Chemical, because energy is released during the reaction: Energy can be released in both nuclear and chemical reactions, so this observation alone is not sufficient to determine the type of reaction.
Nuclear, because energy is released during the reaction: While energy can be released in nuclear reactions, it is not exclusive to them. Chemical reactions can also release energy, such as in exothermic reactions.
Nuclear, because the mass decreased after the reaction: This observation suggests a change in mass, which could be indicative of a nuclear reaction. However, it is important to consider that chemical reactions can also involve changes in mass, such as the formation of gases or dissolution of a solid.
Overall, the most conclusive evidence to identify the type of reaction is the formation of a new substance, which aligns with a chemical reaction.
Option 4
For more such questions on Chemical visit:
https://brainly.com/question/29886197
#SPJ8
Which of the following combinations will result in a reaction that is spontaneous at all temperatures?
Negative enthalpy change and negative entropy change
Negative enthalpy change and positive entropy change
Positive enthalpy change and negative entropy change
Positive enthalpy change and positive entropy change
PLS EXPLAIN WHAT EACH MEANS AND THE VARIABLES AND THE EXPLANATION BEHIND IT
Answers
Answer:
\(\huge\boxed{Option \ 2}\)
Explanation:
A reaction is spontaneous at all temperatures by the following combinations:
=> A negative enthalpy change ( \(\triangle H < 0\) )
=> A positive entropy change ( \(\triangle S > 0\) )
See the attached file for more better understanding!
from Gibbs Equation, \( \Delta G = \Delta H - T\Delta S \)
reaction is spontaneous if $\Delta G$ is negative.
so, first option is not valid at high temperature, ($-h+ts$)
second, is always a spontaneous reaction, ($-h-ts$)
third, is never spontaneous ($+h+ts$)
4th is similar to second, spontaneous at higher temperatures ($+h-ts$)
Which statement about the Sun's rotation is TRUE?
Answers
The Sun rotates at different rates at different latitudes on the Sun
What is the rotation of the sun?The sun revolves around its axis like a ball in motion. One cycle of the sun takes approximately 27 days. But the sun rotates at various rates in various parts. The sun's equator rotates more quickly than its poles. Differential rotation is the name given to this phenomena.
The depth of the sun also affects how quickly it rotates, with the core regions rotating more slowly than the outer regions.
Learn more about rotation of the sun:https://brainly.com/question/20694267
#SPJ1
Missing parts;
Which statement about the Sun's rotation is TRUE?
The Sun rotates only at the equator, where the sunspots are found; the rest of the Sun does not rotate
Only the atmosphere of the Sun rotates, not the main body of the Sun
The Sun rotates at different rates at different latitudes on the Sun
The Sun rotates once a day
The Sun does not rotate; only planets rotate
Which best explains why an Al 3+ ion is smaller than an Al atom?
In forming the Al³+ ion, the Al atom loses the electrons in its outermost energy
level, causing a decrease in the atomic radius.
In forming the Al3+ ion, the Al atom gains three protons and the resulting net
positive charge keeps the electrons more strongly attracted to the nucleus,
reducing the radius.
The Al3+ ion contains more electrons than the Al atom, which results in a greater
attraction for the nucleus and a smaller atomic radius.
In forming the A13+ ion, the Al atom adds electrons into a higher energy level,
causing a decrease in the atomic radius.
There are more protons in an Al3+ ion than there are in an Al atom.
Answers
In forming the Al³⁺ ion, the Al atom loses the electrons in its outermost energy level, causing a decrease in the atomic radius, hence option A is correct.
The number of protons in the nucleus of AlandAl3+ AlandAl3+ is the same, however there are differing numbers of electrons in the final shell. Al³⁺ is smaller than Al because it has fewer electrons.
The Al atom will become an Al³⁺ ion when it loses its third electron and develops a tri-positive charge on it. In forming the Al³⁺ ion, the Al atom loses the electrons in its outermost energy level, causing a decrease in the atomic radius.
Learn more about electrons, here:
https://brainly.com/question/30820925
#SPJ1
How is fission different than alpha or beta decay?
Answers
Fission is when the parent atom splits into two daughter products. Whereas atom with a mass number is lower by 4 and an atomic number is lower by 2.
Is nuclear fission alpha or beta?Fission outcomes emit beta radiation, while actinides mainly emit alpha radiation. Many of each also radiate gamma radiation.
The beta decays form an isobaric, fission-product decay chain for each mass number.
Thus, Fission is when the parent atom splits into two daughter products.
To learn more about fission click here:
https://brainly.com/question/2732120
How many molecules of sugar C6H1206 are in a mole?
Answers
Answer:
i.e. mass of 1 mole of glucose, C6H12O6 = (6 × 12.01 + 12 × 1.01 + 6 × 16.00) g = 180.18 g (using atomic weight data to 2 decimals) 1 mole of carbon atoms weighs 12.01 g and there are 6 moles of C atoms in 1 mole of glucose, so the mass of carbon in 1 mole of glucose = 6 × 12.01 g = 72.06 g.
How many total atoms are there in 62.5 g
of carbon disulfide ( CS2)?
Total atoms:
Answers
Answer:
first molecular mass of cs2= 12+2×32=76amu
no of moles=62.5/76=0.822moles
total no of molecules=6.022×\(10^{23}\)×0.822=4.95×\(10^{23}\)
total no of atoms ( one carbon disulfide has 3 atoms)=3×4.95×\(10^{23}\)=14.85×\(10^{23}\) atoms
Explanation:
i hope you find it helpful, have a nice day
In 62.5 g of carbon disulfide (CS2), there are approximately 1.48 x 10^24 total atoms. This is calculated by first finding the number of moles in 62.5 g, then multiplying this by the number of atoms in each mole (Avogadro's number).
Explanation:To calculate the total atoms in a 62.5 g of carbon disulfide (CS2), you need to first find the molar mass of CS2 which is 76.14 g/mol (12.01 g for C + 2 * 32.06 g for S). Using Avogadro's number (6.02 x 10^23) which represents the number of entities in a mole, we can calculate the number of moles and then the total number of atoms.
First, calculate the number of moles in 62.5 g of CS2: 62.5 g / 76.14 g/mol = 0.820 moles
Second, calculate the total atoms: 0.820 moles * 3 atoms/mole * 6.02 x 10^23 = 1.48 x 10^24 atoms
Learn more about Atom Count here:https://brainly.com/question/31881632
#SPJ3
Which statements describe inorganic compounds? Check all that apply
Inorganic compounds contain carbon
Inorganic compounds usually lack carbon
Inorganic compounds are not associated with or made from living things,
Inorganic compounds include fruits and vegetables,
Inorganic compounds include salt and water
Answers
Answer:
b, c, e
Explanation:
Inorganic compounds usually lack carbon.
Inorganic compounds are not associated with or made from living things.
Inorganic compounds include salt and water.
Answer:
yes the answer id bce
Explanation:
Can someone help me please. Use your knowledge of waves and the electromagnetic spectra to explain how electromagnetic radiation affects molecules? Be sure to include 3 specific examples
Answers
Here are three specific examples of how electromagnetic radiation affects molecules:
1. Ultraviolet (UV) radiation: UV radiation has enough energy to break chemical bonds in molecules, which can lead to the formation of free radicals. Free radicals are highly reactive and can damage cells and DNA, leading to mutations and cancer. For example, UV radiation from the sun can cause thymine dimers in DNA, which can disrupt DNA replication and lead to mutations.
2. Infrared (IR) radiation: IR radiation can cause molecules to vibrate, which can lead to changes in the molecular structure and properties. For example, IR radiation can be used to identify the functional groups in a molecule, such as the C=O bond in a carbonyl group. The absorption of IR radiation by a molecule can also lead to the release of heat, which can be used in various applications, such as in infrared heaters.
3. X-rays: X-rays have enough energy to ionize molecules, which can lead to the formation of free radicals and other reactive species. The ionization of molecules by X-rays is used in medical applications, such as in radiation therapy for cancer. However, the ionization of molecules by X-rays can also lead to damage to healthy cells and tissues, which can lead to side effects.
In summary, electromagnetic radiation affects molecules by causing them to vibrate, rotate, dissociate, and even ionize. The specific effects of electromagnetic radiation on molecules depend on the energy and frequency of the radiation, as well as the properties of the molecules.
How many moles of aluminum are needed to react completely with 4.8 mol of FeO?
2Al(s) + 3FeO(s)- 3c(s) + ABO3()
Answers
Answer:How many moles of aluminum are needed to react completely with 1.2 mol of FeO? 2Al(s) + 3FeO(s) = 3Fe(s) + Al2O3(s). 0.8 mols.
Explanation:
R = 8.314 L kPa K-1 mol-1 and 1 atm = 760 mmHg = 101.3 kPa(i) A car tyre has a volume of 10 litres. At 25°C the tyre is inflated to 200 kPa withnitrogen gas. What is the mass of nitrogen gas in the tyre? (ii) What will be the pressure inside the tyre if it is heated to 50°C?
Answers
Part i) We will use the ideal gas law to answer this question:
\(\begin{gathered} PV=nRT \\ P:pressure\text{ }of\text{ }gas=200\text{ }kPa \\ V:volume=10\text{ }L \\ n:number\text{ }of\text{ }moles \\ R:gasconstant=8.314\text{ }LkPaK^{-1}mol^{-1} \\ T:temperature(273.15K+25\degree C=298.15K) \end{gathered}\)We will determine number of moles of nitrogen gas by using the ideal gas law then use this information to calculate the mass.
\(\begin{gathered} n=\frac{PV}{RT} \\ n=\frac{200kPa\times10L}{8.314\text{ }LkPaK^{-1}mol^{-1}\times298.15K} \\ n=0.81moles \\ \\ mass=moles\times molar\text{ }mass \\ mass=0.81moles\times28gmol^{-1} \\ mass=22.68g \end{gathered}\)Part i) Answer: The mass of nitrogen gas in the tyre is 22.68g.
Part ii) For this question we will use the ideal gas law as well in addition to the number of moles that was determined in part 1 and the new temperature. The temperature in K is 323.15K
\(\begin{gathered} P=\frac{nRT}{V} \\ P=\frac{0.81mol\times8.314\text{ }LkPaK^{-1}mol^{-1}\times323.15K}{10L} \\ P=217.62\text{ }kPa \end{gathered}\)Part ii) Answer: The new pressure will be 217.62 kPa
Brainliest fast before 5:35 no link no bot
Answers
Answer:
1.) 7
2.) 5
3.) stable
4.) 5A
5.) 5
6.) The properties would be more stable to property of phosphorous because same group and valenve electronics and they also have same chemical
Explanation:
The rest i dont know
Exercise 8 If 46.0g of CH₂ reacts with 32.0g O. According to the following reactio CH₂ + 20₂ - CO₂ + 2H₂O a. Which substance is limiting reactant? b. How many grams of it remain unreacted? c. How many grams of CO₂ would be produced?
Answers
Answer:
limiting reagent is 02
mass of CO2 is 11g
Explanation:
the limiting reagent is the reagent which is consumed completely
no of mole of CH2 = m in g / molar mass
= 46.0/(12+2)
= 3.285 moles.
no of mole of O2 = 32/32
= 1 mole
from the reaction
1 mole of CH2 ==> 2 mol of O2
3.285 mol ==> 1/2 mol
3.285 mol ==> 0.5 mol
:. since O2 has the lowest mol , it's the limiting reagent
the limiting reagent mol will be used to find the no of mole of CH2
2 mol of O2==> 1 mol of CO2
0.5 mol ==> 0.5/2
0.25 mole of CO2
mass = 0.25 * ( 12+32)
= 11g
you can support by rating brainly it's very much appreciated ✅
c) Discuss precision and Accuracy as they relate to types of errors.
what is the answer
Answers
Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.
Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.
Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.
Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.
Errors in measurements can be classified into two types: random errors and systematic errors.
Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.
Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.
In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.
Know more about Precision here:
https://brainly.com/question/30461151
#SPJ8
Someone please help anyone who steals points will be reported
Answers
Answer:
ecosystem i think
Calculate the concentration in mol/L, M, of an aqueous sugar solution with a concUsing the above equation, how many grams of salt ( CaCl2 ) would need to be added to 1 L of water in order for the boiling point of the solution to reach 106 °C ? Assume that the density of water is 1.0 g/mL and that CaCl2 completely dissociates into three ions — i.e., a Ca2+ ion and two Cl− ions. The boiling point constant, kb , for water is 0.515°C/m .entration of 17.0% (w/w) and density of 1.015 g/mL at 25°C . The molecular weight of sugar is 342.30 g/mol. Report your answer to three significant figures.
Answers
The molar mass of the sugar is obtained as 1.43 g/mol.
What is the molecular mass?We know that the boiling point of a substance is one of the properties of the substances that could be called the colligative properties since they can be affected by the number of particles present.
We are told that the mass concentration of the substances w/w of the solution is 17% thus we have 17 g of the compound and 83 g of water. We can now get the number of moles of the substance as;
Number of moles = ?
Mass of the solution = 1000 mL * 1.015 g/mL = 1015 g or 1.015 Kg
Given that;
ΔT = K m i
ΔT = Boiling point elevation
K = Boing constant of water
m = molality of the solution
i = Van't Hoff factor
ΔT = 106 °C - 100°C
= 6 °C
Then;
6 = 0.515 * 17/MM * 1/1.015 * 1
Where MM = molar mass of the sugar
6 = 0.515 * 17/1.015 MM * 1
6 = 0.515 * 17/1.015 MM
6 = 8.755/1.015 MM
6 * 1.015 MM = 8.755
MM = 8.755/6 * 1.015
MM = 1.43 g/mol
Learn more about molar mass:https://brainly.com/question/12127540
#SPJ1
combustion always result in to formation of water. what other type of reactions may result into formation of water? examples of these reactions
Answers
As combustion always result into the formation of water, the other type of reactions that may result into formation of water are Acid-Base Neutralization Reactions and Hydrogen and Oxygen Reaction.
Acid-Base Neutralization Reactions:
A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products.
H⁺ ions and OH⁻ ions combine to generate water during a neutralisation reaction. Acid-base neutralisation is the most common type of neutralisation reaction.
Example: Formation of Sodium Chloride (Common Salt):
HCl + NaOH → NaCl + H₂O
Hydrogen and Oxygen Reaction:
Water vapour is created when hydrogen gas (H₂) and oxygen gas (O₂) are combined directly. This reaction produces a lot of heat and releases a lot of energy.
Example: 2 H₂ + O₂ → 2 H₂O
Learn more about reactions:
https://brainly.com/question/25769000
determine the amount of time it takes for 3/4 of a radioactive sample of an isotope of bromine to decay. The half-life of the isotope is 16.5 hours.
Answers
Based on the given half-life, the amount of time it takes for 3/4 of a radioactive sample of an isotope of bromine to decay is 33 hours.
What is the half-life of a radioactive isotope?The time needed for a quantity to decrease to half of its initial value is known as the half-life. In nuclear physics, the phrase is frequently used to indicate how rapidly unstable atoms decay radioactively or how long stable atoms last.
Any substance that contains unstable atoms that release ionizing radiation during their natural decay is considered radioactive material.
Given the half-life of the radioactive sample of an isotope of bromine to be 16.5 hours. The amount of time it takes for 3/4 of a radioactive sample of an isotope of bromine to decay is calculated as follows:
After one half-life, half of the sample remains, and half decays
After two half-lives, 1/4 of the sample remains, and 3/4 decays
The time for two half-lives = 16.5 hours * 2
The time for two half-lives = 33 hours.
Learn more about half-lives at: https://brainly.com/question/1160651
#SPJ1