3. Two boxes need to be moved. Box A is 10 kg. Box B is 3 kg. Which box will 1 point
require more force to move?
BOXA
BOX
Answers
Answer:
box A
Explanation:
10 is bigger than 3 since 10 is bigger it has more force in it
Related Questions
Molal boiling-point-elevation constant (Kb ) for pure water is 0.51 0C/ m. A dilute solution of a nonvolatile solute (does not dissociate) in water was found to boil at 105.1 0C. The concentration of the nonvolatile solute in the solution is ----------------- m.
Answers
Molal boiling-point-elevation constant (Kb ) for pure water is 0.51 0C/ m. A dilute solution of a nonvolatile solute (does not dissociate) in water was found to boil at 105.1 0C. The concentration of the nonvolatile solute in the solution is 1.18 m.
A molal boiling-point-elevation constant is a measure of the elevation of a solvent's boiling point. This is achieved by dissolving a solute in a solvent. The solvent is given a higher boiling point by the solute. Molality, which is a measure of the number of moles of solute in a solvent per kilogram of solvent, is used to calculate the boiling point elevation. It is a temperature change resulting from the addition of solute to the solvent. Molal boiling-point-elevation constant (Kb ) for pure water is 0.51 0C/ m. A dilute solution of a nonvolatile solute (does not dissociate) in water was found to boil at 105.1 0C. To calculate the molarity of a solution, the following formula is used:
ΔTb = Kb x m x i.
ΔTb is the boiling point elevation, Kb is the molal boiling-point-elevation constant of the solvent, m is the molality of the solute in the solution, and i is the van't Hoff factor.
The boiling point elevation is calculated by subtracting the boiling point of the solvent from the boiling point of the solution. The boiling point of pure water is 100°C.
ΔTb = 105.1 - 100 = 5.1.
We know that the molal boiling-point-elevation constant (Kb ) for pure water is
0.51 0C/ m.
So, 5.1 = 0.51 x m.
The value of m can be calculated as follows:
m = 5.1 / 0.51 = 10.
Therefore, the concentration of the nonvolatile solute in the solution is 1.18 m.
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• True False estion 2 (1 point) Water and ice are made from the same molecule H2O True False
Answers
Answer:
true i think
Explanation:
If poison expires does that mean it won't have the poisonous effect?
Answers
Answer:
no.
Explanation:
My mother packed my woollen clothes in the summer season. She added a few white
coloured balls along with my clothes in the almirah . In the winter season when I opened the
almirah most of the balls had disappeared and a very few were left that had considerably
decreased in size. I was amazed.
a. What was the composition of those balls?
b. Why had those balls disappeared/decreased in size?
c. What was the purpose of putting those balls along with clothes?
Answers
a. The balls were most likely mothballs, which are commonly made of naphthalene or paradichlorobenzene.
b. The balls disappeared/decreased in size due to sublimation, where they transitioned from solid to gas without becoming a liquid.
c. The purpose of putting the balls along with clothes was to repel moths and other insects, protecting the woolen clothes from damage during storage.
a. The composition of the balls was most likely mothballs, which are typically made of a chemical compound called naphthalene or paradichlorobenzene.
b. The balls disappeared or decreased in size due to sublimation. Mothballs undergo a process called sublimation, where they transition from a solid to a gas state without going through the liquid phase. This means that over time, the mothballs slowly vaporize and dissipate into the air, resulting in their decrease in size or disappearance.
c. The purpose of putting those balls along with clothes was to prevent damage from moths and other insects. Mothballs contain chemicals that release a strong odor, which is unpleasant to insects. The odor acts as a deterrent and helps protect the clothes from being damaged by moth larvae or other pests that feed on natural fibers like wool. By placing the mothballs in the storage area, it creates an environment that repels these insects and helps preserve the quality of the woollen clothes during storage.
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what product of an acid base reaction is an ionic compound
A. water
B. a metal
C. a gas
D. a salt
Answers
The product of an acid-base reaction that is most likely to be an ionic compound is a salt. Option D).
In an acid-base reaction, the product that is most likely to be an ionic compound is a salt. A salt is formed when an acid reacts with a base, resulting in the transfer of ions between the two reactants. Acids typically release hydrogen ions (H+) when dissolved in water, while bases release hydroxide ions (OH-). When these ions combine, they form water (H2O), which is a neutral molecule.
However, in addition to water, the reaction between an acid and a base also produces a salt. A salt is an ionic compound composed of positive and negative ions. The positive ion usually comes from the base, while the negative ion comes from the acid. The combination of these ions results in the formation of an ionic compound, which is commonly referred to as a salt.
Therefore, the product of an acid-base reaction that is most likely to be an ionic compound is a salt. Hence option D) is correct.
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Bill gates net worth
Answers
Answer:
As of 12/11/2020 Bill Gate's networth is 118.7 billion USD
Explanation:
Answer:
Bill Gates has about 124 billion dollars
Suppose that you are the quality engineer in a company that manufactures a certain chemical product. This product is obtained from the chemical reaction of two components under a high temperature environment, and the level of contaminant of the resulting product is the main parameter subjected to quality control. After a thorough statistical analysis on the data collected from this process, you found that the process variability follows the normal distribution, in which the average contaminant level in the product, , in parts per million (ppm) is a function of other variables of the process given by the following equation:
student submitted image, transcription available belowstudent submitted image, transcription available belowin which P1 is the average purity index of the component 1, P2 is the average purity index of the component 2, and T is the temperature at which the chemical reaction is processed in °C. For the standard deviation of the contaminant level in the product, c, also in parts per million, you found the following equation:
c = 1500P1 2 + 1700P2 2 + 2000P1P2T
in which P1 is the standard deviation of the purity index of the component 1, P2 is the standard deviation of the purity index of the component 2, and T is the standard deviation of the chemical reaction temperature. Currently, the product is being processed with components 1 and 2 having average purity levels of 0.80 and 0.85, respectively. To sustain the chemical reaction, the average temperature of the process must be set to a minimum value of 120°C. Additionally, the standard deviation for the purity index of both components is 0.1, and the standard deviation of the temperature is 0.5°C. In one week, you will have a meeting with a new costumer, who is interested on your product but not sure about its quality standards.
a) If your new customer has established a target value for the contaminant level in the product of 380 ppm, is the current process accurate enough to meet this target value? If not, propose two modifications in the process to meet the target value. Justify your proposals based on numbers. Take into consideration that the maximum purity index possible for the components is 1, and that the maximum reaction temperature allowable is 250°C for safety reasons.
b) Your customer also has a strict requirement that 99% of the products should have a contaminant level between 350 and 410 ppm. Is the current process capable (or precise enough) to meet this requirement? If not, propose two additional modifications in the process to meet the customer requirements. Justify your proposals based on numbers.
Answers
The current process is not accurate enough to meet the target contaminant level of 380 ppm. Two modifications can be proposed to improve the process.
Firstly, increasing the average purity index of component 1 (P1) to 0.85 will reduce the contaminant level. Secondly, reducing the average temperature (T) to the minimum value of 120°C will also decrease the contaminant level. These modifications can be justified based on the given equations for the contaminant level and standard deviation.
In the equation for the contaminant level, a higher P1 value will result in a lower contaminant level. By increasing P1 from 0.80 to 0.85, the contaminant level will decrease. Similarly, by reducing the average temperature from its current value, the contaminant level can be further reduced.
To meet the customer's requirement of 99% of the products having a contaminant level between 350 and 410 ppm, additional modifications are needed. Firstly, decreasing the standard deviation of the purity index for both components (P1 and P2) will reduce the process variability and bring the contaminant levels closer to the target range.
Secondly, reducing the standard deviation of the temperature (T) will also help in reducing the variability of the contaminant levels. These modifications will improve the precision of the process and increase the likelihood of meeting the customer's requirement.
In conclusion, the current process is not accurate enough to meet the target contaminant level and the precision requirement of the customer. Modifying the average purity index of component 1, average temperature, and the standard deviations of purity indices and temperature can improve both accuracy and precision.
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please help me with this
Answers
Answer:
It is A, the answer is A
Explanation:
which pure molecular substance will have the lowest vapor pressure at 25 oc? group of answer choices ch3ch2ch2ch2oh ch3ch2ch2oh ch3ch2oh ch3oh
Answers
Among the given choices (\(CH_{3}CH_{2}CH_{2}CH_{2}OH\), \(CH_{3}CH_{2}CH_{2}OH\), \(CH_{3} CH_{2} OH\), \(CH_{3} OH\)), the pure molecular substance that will have the lowest vapor pressure at 25 °C is \(CH_{3}CH_{2}CH_{2}CH_{2}OH\), which is butanol.
Vapor pressure is dependent on intermolecular forces and molecular weight. As we move from left to right in the given choices, the molecular weight decreases and the strength of intermolecular forces decreases.
\(CH_{3}CH_{2}CH_{2}CH_{2}OH\) (butanol) has the highest molecular weight and exhibits stronger intermolecular forces (due to longer carbon chain and presence of an alcohol functional group) compared to the other substances.
Consequently, it will have the lowest vapor pressure at 25 °C.
On the other hand, \(CH_{3}OH\)(methanol) has the lowest molecular weight and weaker intermolecular forces, resulting in the highest vapor pressure among the given choices at 25 °C.
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the answer to this problem
Answers
Here, each of the elements below with the class to which it belongs.
Lithium → Alkali metals
Uranium → Transition metals
What is an Alkali metals?
Alkali metals are a group of highly reactive chemical elements in the periodic table. These elements include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). Alkali metals have a single electron in their outermost shell, which makes them highly reactive and able to easily lose that electron to form a positive ion. They are typically soft, silvery-white metals that have low melting and boiling points, and are highly reactive with water and other substances. Alkali metals are important in various industrial applications, such as batteries, alloys, and chemical synthesis.
Krypton → Noble gases
Manganese → Transition metals
Fluorine → Halogens
Barium → Alkaline Earth
Most reactive metal → Alkali metals
Silicon → Metalloids
Groups 3-12 → Transition metals
Most reactive nonmetals → Halogens
Inert and unreactive → Noble gases
Has characteristics of metals and nonmetals → Metalloids
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how many grams in a kilogram,how many quarts are in a pint and if how many ml of h20 = 1g
Answers
Answer:
1 g + 10 g
Explanation:
Answer:
there are a thousand grams in a kilo
Phenolphthalein turns litmus paper what color?
Answers
Litmus paper and Phenolphthalein are both indicators. This means they will change colour in the presence of an acid or a base.
Litmus paper turns blue in a base and remains red when it is in contact with an acid or neutral solution. Phenolphthalein turns pink in a base, but is coluorless in an acid or neutral solution.
What is the symbol of the element for 38 protons, 36 electrons, and 40 neutrons?
Answers
The element with 38 protons, 36 electrons, and 40 neutrons is Strontium (Sr).
Strontium (Sr) is the element with 38 protons, 36 electrons, and 40 neutrons. It belongs to the alkaline earth metal group on the periodic table. The atomic number of an element corresponds to the number of protons in its nucleus, so in this case, the atomic number is 38. Since atoms are electrically neutral, the number of electrons in an atom is also equal to the number of protons. Therefore, there are 36 electrons surrounding the nucleus of the strontium atom.
The total number of protons and neutrons in an atom is known as the mass number. In this case, the mass number is 38 (protons) + 40 (neutrons) = 78. Strontium has various isotopes, which are atoms with the same number of protons but different numbers of neutrons. The most common isotope of strontium, with a mass number of 88, has 50 neutrons. However, the specific isotope mentioned in the question has a mass number of 78 and 40 neutrons.
Strontium is a soft, silvery-white metallic element that is highly reactive with water and air. It is commonly used in pyrotechnics to produce red-colored flames. Strontium compounds are also utilized in the manufacturing of ceramics, glass, and fireworks. Its radioactive isotope, strontium-90, has been used in medical imaging and cancer treatments.
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Help please
C2H4O2
1. How many different atoms are in the compound above?________
2. How many atoms of hydrogen?__________
3. How many total atoms are in this compound?________
4. If a big 2 were added in front of the formula, what would that mean?
Answers
Answer:
1. There are three different atoms
2. There are 4 hydrogen
3. There are 8 atoms in the compound
4. All the atoms are double the number
You can choose from four different materials to make the handrails that run up the stairs and around the playhouse: steel, aluminum, solid plastic, or pine wood.
2. Would you want to minimize or maximize the heat transfer to and from the handrails? Explain your reasoning.
Answers
Answer: The best material to make the handrails of the playhouse is Aluminum. This is because aluminum is an extremely versatile metal with a number of advantages, it is recognized for being both lightweight and flexible.
Explanation:
HOPE THIS HELPS!
ALSO THE OTHER ANSWER IS WRONG.
JUST SAYING >33
The half-life of iodine-131 is 8 days. How many milligrams of iodine-131
remain after 24 days if the original amount was 4.00 mg?
A. 1.33 mg
B. 0.667 mg
C. 0.500 mg
D. 0.444 mg
Answers
Answer:
The correct answer is - C. 0.500 mg.
Explanation:
In this case, the half-life of the iodine-131 is 8 days and the initial amount is given 4 mg. According to this after every 8 days, half of the initial value of the iodine-131 remains only.
8 days or 1st half-life = A(i)* 1/2
16 days or two half-life = A(i)* 1/4
24 days or three half-life = A(i)* 1/8
and the remaining amount A would be
= A(i)*1/2^n
= 4 * 1/2^3
= 4 *1/8
= 0.500 mg
The substance that is produced from a chemical reaction
•reactants
•chemical reaction
•atom
•product
•molecule
Answers
Answer - The substance that is produced from a chemical reaction....
REACTANTS
which one of the following is/are most likely to be an ionic compound? group of answer choices fecl3 clf3 so3 kf nh3
Answers
The most likely ionic compound among the given choices is KF (potassium fluoride).
To determine which compound is ionic, we need to look at the bonding between the elements. Ionic compounds are formed when a metal transfers one or more electrons to a non-metal, creating a positive metal ion (cation) and a negative non-metal ion (anion). Among the given choices:
1. FeCl₃ (iron(III) chloride) - It's a polar covalent compound due to the difference in electronegativity between iron and chlorine.
2. ClF₃ (chlorine trifluoride) - A covalent compound because it consists of two non-metals.
3. SO₃ (sulfur trioxide) - A covalent compound consisting of non-metals.
4. KF (potassium fluoride) - An ionic compound because potassium (a metal) transfers one electron to fluorine (a non-metal).
5. NH₃ (ammonia) - A covalent compound consisting of non-metals.
Hence, KF is the most likely ionic compound among these choices.
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a 31.5 g wafer of pure gold initially at 69.9 ∘c is submerged into 63.3 g of water at 26.9 ∘c in an insulated container. the specific heat capacity for gold is 0.128 j/(g⋅∘c) and the specific heat capacity for water is 4.18 j/(g⋅∘c). what is the final temperature of both substances at thermal equilibrium?
Answers
To find the final temperature at thermal equilibrium, we can use the principle of conservation of energy. The heat lost by gold is equal to the heat gained by water. The heat lost by gold can be calculated using the formula: q = m * c * ∆T, where q is the heat lost, m is the mass of gold, c is the specific heat capacity of gold, and ∆T is the change in temperature.
The heat gained by water can be calculated using the same formula, but with the mass and specific heat capacity of water.Setting these two equations equal to each other, we can solve for the final temperature.
Using the given values:
m(gold) = 31.5 g
m(water) = 63.3 g
c(gold) = 0.128 J/(g⋅∘C)
c(water) = 4.18 J/(g⋅∘C)
∆T(gold) = T(final) - 69.9 ∘C
∆T(water) = 26.9 ∘C - T(final)
Solving the equation gives the final temperature of both substances at thermal equilibrium.
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Density of 85mL of water
Answers
Since water served as the foundation for creating the metric system of measurement, density is defined as mass divided by volume (=m/v), meaning that one cubic centimeter (1cm3) of water weighs one gram (1g).
The density of pure water is what.The density of water is typically expressed in terms of grams per milliliter (1 g/ml) or grams per cubic centimeter (1 g/cm3).
85-milliliter outcome
2.988 Ounces
0.1868 Pounds
84.719 Grames
0.0847 Kilograms
Weight at 80°F(26.7°c)
As the temperature drops, the water becomes denser. Water density reaches its maximum at 4 degrees Celsius.
Like a solid, a liquid's density is determined by dividing its mass by its volume, or D = m/v. Water has an average density of one gram per cubic centimeter. No matter the size of the sample, a substance has a constant density.
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The selenate ion, SeO32-, is classified as which of the following?a. polyatomic cationb. monoatomic cationc. polyatomic aniond. monoatomic anione. none of the above
Answers
The selenate ion, SeO₃²⁻, is classified as a. polyatomic anion. Polyatomic ions are composed of two or more atoms covalently bonded together and carry a charge.
In the case of the selenate ion, it consists of one selenium (Se) atom and three oxygen (O) atoms bonded together, with an overall charge of -2. A cation refers to a positively charged ion, whereas an anion refers to a negatively charged ion. Since the selenate ion carries a negative charge, it is an anion.
Furthermore, it is not monoatomic because it consists of more than one atom. Thus, the correct classification for the SeO₃²⁻ ion is a polyatomic anion (option c).
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help me please i need to sleep
Answers
Cloud is a gas.
ice is a solid.
snow is a solid.
steam is a gas.
rain is a liquid.
When moving down a column in the Periodic Table, which of the following increases? PLEASE HELP!!!
OPTIONS
Number of valence electrons
Melting point of the element
Possible number of bonds formed
Metallic character of the element
Answers
Answer:
Metallic character of the element
Explanation:
During the Cellular Respiration reaction glucose reacts with oxygen gas
to form water and Carbon Dioxide. How much carbon Dioxide would be formed from 58 grams of glucose?
Answers
try putting 66 grams CO2 for answer
Persamaan berikut menunjukkan tindak balas antara asid sulfurik dan kalium hidroksida.Berapakah isi padu larutan kalium hidroksida 0.5 mol dm-3 yang boleh meneutralkan 50.0 cm3 asid
sulfurik 0.5 mol dm-3?
H2SO4 + 2KOH -> K2SO4 + 2H2O
A 25.0 cm3
B 50.0 cm3
C 100.0 cm3
D 400.0 cm3
Answers
Explanation:
2 KOH (aq) + H2SO4 (aq) →K2SO4 (aq) + 2 H2O (l)
how might using water somethimes require changing its original state?
Answers
has any one done 2020 chemistry paper 1 aqa gcse
Answers
Answer:
what do you mean?
Explanation:
can someone please help me:(
Answers
Answer:
I think (B) is right answer because here oxygen is a combustible material and combustible is always take place when oxygen is burn
an 8.51g sample of an unknown salt (MM=116.82g/mol) is dissolved in 150g water in a coffee cup calorimeter. Before placing the sample in the water, the temperature of the salt and water is 23.7ºC. After the salt has completely dissolved, the temperature of the solution is 28.54ºC. What is the total mass inside the calorimeter in grams?
Answers
An 8.51g sample of an unknown salt is dissolved in 150g water in a coffee cup calorimeter, leading to a temperature increase from 23.7 °C to 28.54 °C. The mass of the formed solution is 159 g.
An 8.51g sample of an unknown salt (MM=116.82g/mol) is dissolved in 150g water in a coffee cup calorimeter. This means that we have a solution formed by 8.51 g of solute and 150 g of solvent. The mass of the solution is equal to the sum of the mass of the solute and the mass of the solvent.
\(m = m_{solute} + m_{solvent} = 8.51 g + 150 g = 159 g\)
The mass of the solution does not vary with the change in the temperature caused by the solution of the salt.
An 8.51g sample of an unknown salt is dissolved in 150g water in a coffee cup calorimeter, leading to a temperature increase from 23.7 °C to 28.54 °C. The mass of the formed solution is 159 g.
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Number 8 question need help
Answers
Answer:
where is the question
Explanation:
pls. send it