Answers
The Percent error in the calculation of densities of the metal during experiment is 0.03 %
What is Percentage error?Percent error is the difference between estimated value and the actual value in comparison to the actual value and is expressed as a percentage.
Percent error = [Experimental value - Theoretical value] / Theoretical value x 100%
Percent error = 7.83 -7.86 / 7.86 x 100
= 0.03 %
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Related Questions
If I add 2 grams of sugar to 50 grams of water what should the mass of my
mixture be?
Answers
Answer:
\(m_{mixture}=52g\)
Explanation:
Hello.
In this case, since your mixture is composed by sugar and water, its mass turns out:
\(m_{mixture}=m_{sugar}+m_{water}\)
Whereas the mass of sugar is 2 g and the mass of water is 50 g, therefore, the result is:
\(m_{mixture}=2g+50g\\\\m_{mixture}=52g\)
Best regards.
Which one of these are a physical property? Select all that apply. a. Luster (shininess) Conducts Electricity Reactivity with water d. Temperature b. 0 0
Answers
A gas sample is heated from -20.0 C to 57.0 C and the volume is increased from 2.00 L to 4.50 L If the initial pressure is .140 atm, what’s the final pressure?
Answers
0.081atm
Explanations:According to general gas equation expressed as:
\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\)where:
• P1 and P2 are the ,initial and final pressure
,• V1 and V2 are the ,initial and final volume
,• T1 and T2 are the i,nitial and final temperature
Given the following parameters
\(\begin{gathered} V_1=2.00L \\ V_2=4.50L \\ T_1=-20.0^0C+273=253K \\ T_2=57^0C+273=330K \\ P_1=0.140atm \end{gathered}\)Required
Final Pressure P2
Substitute the given parameters into the formula
\(P_2=\frac{P_1V_1T_2}{V_2T_1}\)Substitute the given following parameters into the formula
\(\begin{gathered} P_2=\frac{0.14\times2.00L\times330K}{4.50L\times253K} \\ P_2=\frac{92.4}{1138.5} \\ P_2=0.081atm \end{gathered}\)Hence the final pressure of the gas sample is 0.081atm
A chemist weighed out 7.22 g of silver. Calculate the number of moles of silver she weighed out.
Be sure your answer has the correct number of significant digits.
Answers
Answer:
0.067 mole Ag°
Explanation:
Given 7.22 g Ag° = 7.22g Ag/ 107.8g/mol = 0.0670 mole Ag° (3 sig. figs.)
A beaker is filled to the 500 mL mark with alcohol. What increase in volume (in mL) does the beaker contain when the temperature changes from 5° C to 30° C? (Neglect the expansion of the beaker, evaporation of alcohol and absorption of water vapor by alcohol.) The volume coefficient of expansion γγ for alcohol = 1.12 x 10-4 K-1
Answers
Answer:
"1.4 mL" is the appropriate solution.
Explanation:
According to the question,
\(v_0=500\)\(\alpha =1.12\times 10^{-4}\)\(\Delta \epsilon = 25\)Now,
Increase in volume will be:
⇒ \(\Delta V = \alpha\times v_0\times \Delta \epsilon\)
By putting the given values, we get
\(=1.12\times 10^{-4}\times 500\times 25\)
\(=1.12\times 10^{-4}\times 12500\)
\(=1.4 \ mL\)
need help with this pleaseeeeeeeeeeeeeeWhat trends do you see in the organisms of the ecosystem if youdecrease sunlight A. Increase in energy storage moleculesB. Decrease in H2OC. Decrease in energy storage moleculesD. Increase in CO2
Answers
Answer:
Explanations:
Answer:
Explanations:
The switch is used to ___________ or __________ an electrical circuit. When the switch is on, the circuit is __________ , and when the switch is _________ the circuit is open. Electrical current exists in the circuit when it is closed, but when it is open, there is no ____________ current in the circuit. The switch determines whether the circuit is open and closed
Answers
Answer:
The switch is used to disconnect or connect an electrical circuit. When the switch is on, the circuit is complete, and when the switch is off, the circuit is open. Electrical current exists in the circuit when it is closed, but when it is open, there is no electrical current in the circuit. The switch determines whether the circuit is open and closed.
What would make oppositely charged objects attract each other more?increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged objectdecreasing the positive charge of the positively charged object and decreasing the negative charge of the negatively charged objectincreasing the distance between the positively charged object and the negatively charged objectmaintaining the distance between the positively charged object and the negatively charged object
Answers
Answer:
increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object would make the oppositely charged objects attract each other more.
1 gallon =3.785 L how many liters of gasoline will fill a 10.00 tank
Answers
Answer:
37.85 L
Explanation:
3.785 x 10.00 = 37.85 L
it would take 37.85 L to fill a 10.00 tank
(sorry if im wrong pls dont report)
(hope this helps can i plz have brainlist :D hehe)
Which of the following molecules would you expect to have the highest boiling point?
1
O Molecule 3
O Molecule 1
O Molecule 4
O Molecule 2
2
3
OH
O
4
Answers
The highest boiling point based on the data is option 4
What is the highest boiling point?Compared to alcohols of comparable molecular weight, carboxylic acids often have higher boiling temperatures. Between the hydrogen atoms of adjacent molecules and the oxygen in the carboxyl group of carboxylic acids, strong intermolecular hydrogen bonds can develop. Because it takes more energy to break the intermolecular interactions and change the substance from a liquid to a gas during boiling, these hydrogen bonds help materials have higher boiling temperatures.
Although carboxylic acids and alcohols are both capable of forming hydrogen bonds, carboxylic acids have higher boiling temperatures due to the extra carboxyl group that they contain.
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Which of the following describes a difference between thunderstorms and hurricanes?
A Hurricanes last for a shorter period of time than thunderstorms.
B
Thunderstorms have much stronger winds than hurricanes.
с Thunderstorms don't have a spiral wind formation and hurricanes do.
D
Hurricanes form over warm land while thunderstorms form over water.
Answers
Answer:
The answer to your question is C. Thunderstorms don't have a spiral wind formation and hurricanes do. Hope this helps.
Explanation:
What is an extended structure? How do extended structures make up substances
Answers
Two asteroids are 75,000 m apart one has a mass of 8 x 10^7 N what is the mass of the other asteroid
Answers
The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg
To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:
F = (G * m1 * m2) / \(r^{2}\)
where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.
Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):
1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)
Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.
The question was incomplete. find the full content below:
Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid
A. 3.4 x \(10^{11}\) kg
B. 8.3 x \(10^{12}\) kg
C. 1.2 x \(10^{12}\) kg
D. 1.2 x \(10^{10}\) kg
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6) The density of ammonia gas (NHs) in a 6.0 L container at a pressure of 820 mm Hg and a g/L.
Answers
The density of ammonia gas in the 6.0 L container at a pressure of 820 mm Hg is approximately 0.805 g/L.
To determine the density of ammonia gas (NH3) in a 6.0 L container at a pressure of 820 mm Hg, we need to use the ideal gas law equation, which relates pressure, volume, number of moles, and temperature for a given gas.
The ideal gas law equation is:
PV = nRT
Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
Since we are given the pressure (820 mm Hg), volume (6.0 L), and assuming standard temperature and pressure (STP), we can use the values for R (0.0821 L·atm/(mol·K)) and convert the pressure to atm by dividing by 760 (1 atm = 760 mm Hg).
820 mm Hg / 760 mm Hg/atm = 1.08 atm
Now we can rearrange the ideal gas law equation to solve for density (d):
d = (P * M) / (RT)
Where M is the molar mass of ammonia (NH3), which is approximately 17.03 g/mol.
Substituting the values, we have:
d = (1.08 atm * 17.03 g/mol) / (0.0821 L·atm/(mol·K) * 298 K)
Simplifying the equation, we find:
d ≈ 0.805 g/L
Therefore, the density of ammonia gas in the 6.0 L container at a pressure of 820 mm Hg is approximately 0.805 g/L.
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Which statement describes all chemical changes, but not all physical changes?
Answers
Answer:
A new substance forms.
Explanation:
Answer:
B
Explanation:
What was the chemical purpose of heating the MnSO4⋅H2O? Why is this procedure important?
Answers
The chemical purpose of heating the MnSO4⋅H2O is to eliminate water with the formation of new compounds.
Dehydration reactionsDehydration reaction is a type of chemical reaction that involves the removal of water which would eventually lead to the formation of a new compound.
The molecule of MnSO4⋅H2O contains a molecule of water(H2O). After heating of the molecule, water is lost giving rise to the dry compound MnSO4.
Other examples of dehydration reactions are:
Reactions that produce acid anhydrides.Reactions that involve the production of polymers.Reaction of sucrose with concentrated sulfuric acidTherefore, the chemical purpose of heating the MnSO4⋅H2O is to eliminate water with the formation of new compounds.
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A 5ml solution containing ph of 3.5 was mixed with a solution containing ph of 10.5
What will you expect the pH of the mixture be? Basic, acidic, or neutral? Also provide the pH of the combined solution.
Answers
The resulting solution will be neutral having a pH of 7.
What is the pH?The term pH is defined as the hydrogen ion concentration in solution. We know that the pH is inversely related to the hydrogen ion concentration in solution.
We know that the reaction between an acid and a base produced a salt. In this case, the salt that is produced is neutral because the acid is completely reacted with the base.
Since the solution contains a mixture of a containing pH of 3.5 and that of a pH of 10.5, the resulting solution will be neutral having a pH of 7.
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How many grams of ( S ) - 1 - chloro - 4 - ethyl - 2 - methylhexane and triphenylphosphine would you need to create 4 . 1 5g of ( S ) - 1 - chloro - 4 - ethyl - 2 - methyl triphenylphosphonium assuming an 8 1 % yield for the reaction?
Answers
Answer:
Explanation:
The standard molar mass is:
For (S )-1-chloro-4-ethyl-2-methylhexane = 162.5 g/mol
For triphenylphosphine = 262 g/mol
For ( S )-1-chloro-4-ethyl-2-methyl triphenylphosphonium = 424.5 g/mol
The mass required for 81% yield = \(\dfrac{81}{100} \times Theoretical \ yield = 4.15 g\)
Theoretical yield = \(\dfrac{4.15}{0.81}\)
= 5.1235 g
thus, since 424.5 g yield produce from 162.5 g
∴
5.1235 g yield will produce = \(\dfrac{162.5}{424.5}\times 5.1235 \ g\)
= 1.9613 g of alkyl halide (-chloro) required.
Also, since 424.5 g yield produce from 262 g phosphine
∴
5.1235 g yield will produce = \(\dfrac{262}{424.5}\times 5.1235 \ g\)
= 3.1622 g of triphenylphosphine required.
Think of an example in which chemical and physical weathering affects a rock
Answers
Answer:
chemical-Acid rain eating away at the rock
Physical-Dust particles eroding the rock overtime in the wind
Explanation:
Magnesium velocity acceleration
Answers
Br2 + NaCl → NaBr + Cl2
Answers
Answer:
NaBr is a reducing agent, Cl 2 is an oxidizing agent. ; Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
Explanation:hope its help
An iceberg has a volume of 7605 cubic feet.
The density of ice is 0.917 g/cm3 .
1ft=30.48cm
Whats the mass in Kg?
Answers
Based on the volume and the density of the iceberg, the mass of the iceberg is 197475.603 kg.
What is the volume of the iceberg in cm³?The volume of the iceberg in cm³ is determined as follows:
1 ft = 30.48 cm
1 ft³= 30.48 cm * 30.48 cm * 30.48 cm
1 ft³= 28316.847 cm³
The volume of the iceberg in cm³ = 7605 * 28316.847 cm³
The volume of the iceberg in cm³ = 215349621.4 cm³
The mass of the iceberg is then determined as follows:
Mass = density * volume
The mass of the iceberg = 215349621.4 cm³ * 0.917 g/m³
The mass of the iceberg = 197475602.9 g 197475.603 kg
The mass of the iceberg = 197475.603 kg
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Which of the following characteristics describe COVALENT BONDS! *
2 points
A transfer of electrons from one atom to another
A pair of valence electrons are shared between two atoms
Draw curved arrows to show transfer of electrons
Draw straight lines to show sharing of electrons
Uses no charged ions.
Uses Ions (cations and anions)
Uses no prefixes to name
Uses prefixes to name
Is made of metal and nonmetal atoms
Is only made of nonmetal atoms
Answers
Answer: only made of non metal atoms and a pair of valence electrons are shared between two atoms
Which two atoms are isotopes of each other? A. Si with a mass number of 27 and an atomic number 14, and Mg with a mass number of 25 and an atomic number of 12. B. Mg with a mass number of 24 and an atomic number 12, and Al with a mass number 24 and an atomic number 13. C. Mg with a mass number 24 and an atomic number 12, Mg with a mass number 25 and an atomic number 12. D. Na with a mass number 23 and an atomic number 11, Mg with a mass number 25 and an atomic number 12.
Answers
The two atoms are isotopes of each other are Si with a mass number of 27 and an atomic number 14, and Mg with a mass number of 25 and an atomic number of 12. The correct option is A.
What are isotopes?Isotopes are atoms with the same number of protons but differing numbers of neutrons.
They differ in mass, which affects their physical characteristics even if they have nearly identical chemical properties.
An isotope is one of two or more chemical elements that exist in different forms. Varied isotopes of an element share the same atomic number and protons in their nuclei, giving them the same atomic weight.
However, each elemental isotope has a different amount of neutrons, which changes its atomic weight.
They can be referred to as isotopes because Si, which has a mass number of 27 and an atomic number of 14, and Mg, which has a mass number of 25 and an atomic number of 12, both have 13 protons.
Thus, the correct option is A.
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The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
Answers
The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
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What is lymph?
oxygen-rich blood on its way to body tissues
plasma circulating in lymphatic vessels
a lymphoid tissue that filters blood
an organ that hosts lymphocytes
Answers
What do amino acids, fatty acids, and sugars have in common
Answers
Answer:
they all have the letter a
Explanation:
What amino acids, fatty acids, and sugars (monosaccharides) have in common is that they are made of carbon, oxygen, and hydrogen.
Hope your day or night is good well
They are made of carbon, oxygen, and hydrogen.
Hope this helps you out
*smiles*
Can someone help me with this
What is this chemistry form
Answers
Answer:
Think it's C16H31FN2O2, but I couldn't find anything else about it.
Explanation:
It's an organic chemistry skeletal structure and it's very difficult to explain how to read. Hopefully this gave you a push in the right direction, I know it wasn't the most complete answer.
Explain why the total mass of carbon must be decreasing in a different step of the slow carbon cycle based on the increase in atmospheric CO2.
Answers
Total mass of carbon must be decreasing in different step of carbon cycle because matter is conserved in the processes and reactions of carbon cycle. Carbon is a matter and it is the major constituent of living organisms.
Carbon cycle refers to processes where carbon move from the atmosphere to the biosphere and Earth and then back to the atmosphere.
It involves processes of using and reusing carbon again and again and it's conservation.
Carbon is an organic matter found in living organisms and total mass of carbon reduces because it is a matter that is conserved.
Carbon is released from that atmosphere, use for photosynthesis, plants and animals consume the plants. They defecate , respirate and carbondioxide is released during respiration.
Therefore,Total mass of carbon must be decreasing in different step of carbon cycle because because matter is conserved in the processes and reactions of carbon cycle. Carbon is a matter and it is the major constituent of living organisms.
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Air tight container drying agent or desiccant is called ?
Answers
Answer:
Air tight container drying agent or desiccant is called,
Explanation:
A desiccator is an airtight glass vessel with a suitable drying agent, anhydrous calcium chloride placed at the bottom of the vessel.