Answer:
The mass of 42.3 moles of potassium sulfate is 7,371.1557 grams
Explanation:
Potassium sulfate K₂SO₄ which is also known as sulphate of potash is a water soluble common component of fertilizer
The molar mass of potassium sulfate, M = 174.259 g/mol
The given number of moles of potassium sulfate, n = 42.3 moles
The mass, 'm', of a given number of moles of potassium sulfate, 'n', is given as follows;
m = n × M
Therefore, we have;
The mass, 'm', of 42.3 moles of potassium sulfate is found by plugging in the values for 'M', and 'n', in the above equation as follows;
m = 42.3 moles × 174.259 g/mol = 7,371.1557 grams
The mass of 42.3 moles of potassium sulfate, m = 7,371.1557 grams.
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Answer:
what dose this even mean?
Explanation:
Petroleum is a mixture of many alkanes. The alkanes are separated and purified at oil refineries. What process decribes what happens in an oil refinery?
Answer:
Fractional distillation
Explanation:
The process of separating petroleum products into its fractions is called fractional distillation.
Fractional distillation is a method of separating a mixture of substances based on the differences in their boiling points.
Petroleum is a mixture of hydrocarbons separated in a large fractionation tower having many trays maintained at different temperatures.
As the vapor containing the petroleum mixture ascends the fractionation tower, the mixture is separated at each tray to yield the various fractions of petroleum.
C6H12O6 O3 NF3 Co KNO3 H2 CO
Which one of these are molecules list all that apply
When silver nitrate (AgNO3) dissolves in water, the temperature of the solution decreases.
Explain your answer
Answer:
The enthalpy of solution for AgNO3 is positive because the temperature of the solution decreases (the dissolution is endothermic). Hsol = Hsolute + Hsolvent + HmixHsolute and Hsolvent are endothermic because energy is required to overcome intermolecular forces and separate solute and solvent particles.
Answer:
the enthalpy of solution for agno3 is positive because the temperature of the solution decreases. (the dissolution is endothermic.)
Delta H sol=delta HSolute +delta H solvent +delta H mix
HSolute and H solvent are endothermic because energy is required to overcome intermolecular forces and separate solute and solvent particles.
H mix is exothermic because energy is released when intermolecular forces form between solute and solvent particles.
if the overall enthalpy of solution is positive, then HSolute + H solvent must be larger in magnitude than H mix.
Explanation:
correct on edge2021
According to the enthalpy diagram below, which of the following statements is true?
Arrows A and D represent the enthalpy of the intermediate chemical reactions.
Arrow C represents the enthalpy of the overall chemical reaction.
Arrow C indicates that the third intermediate reaction is exothermic.
Arrow B indicates that the second intermediate reaction is exothermic.
According to the enthalpy diagram true statement is that Arrow C indicates that third intermediate reaction is exothermic in nature.
What is enthalpy of reaction?Enthalpy of the reaction gives idea about the exchange of heat during the whole chemical reaction process.
Arrow A and Arrow B represents that first and second intermediate reaction is endothermic.Arrow C indicates that third intermediate reaction is exothermic in nature.Hence Arrow C indicates that the third intermediate reaction is exothermic is true statement.
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Answer: c
Explanation:
Can anyone help me with this assignment? Will give Brainliest.
Answer:
i cant get the pdf im so sorry
Explanation:
Answer:
Yes if u need help?
Explanation:
Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below.
The question is incomplete, The complete question is;
Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. What experimental evidence led to the development of this atomic model from the one before it?
Answer:
A few of the positive particles aimed at a gold foil seemed to bounce back.
Explanation:
This model of the atom was proposed by Ernest Rutherford and was called the planetary model of the atom.
This model is based on an experiment using a gold foil on which alpha particles were focused. Most of the alpha particles passed through the foil. Some of the alpha particles were scattered at large angles and a few seemed to bounce back.
This led to the conclusion that the atom has a massive positive core around which electrons move as planets move around the sun.
Answer:
It is A
Explanation:
Which of the following is a limitation of using a model to study a natural event?
A.
The results of a model event are often much more accurate than those of the actual event.
B.
The model and the results it generates will have no relation at all to the actual event.
C.
The size and design of the model will be too similar to the actual event.
D.
The results of a model event may not be similar enough to the results of the actual event.
Answer:
D
Explanation:
why i say that is because take for example a volcano, when you make a model, you'll see what takes place in a real eruption but in real life the lava would burn things in its path, the model volcano may not. That's just an example
Answer:
D
Explanation:
I got it right on study island
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Answer:
I think is the last one!!!! punnet square ⬜
The solubility of AgNO3 at 10° and 20°C are 170g and 222g per 100g H2O. What is the sign of change of heat of solution for AgNO3?
Answer:
The sign of change of heat of solution is positive
Explanation:
The dissolution of AgNO3 in water is represented by the equation;
AgNO3(s) --------> Ag^+(aq) + NO3^-(aq)
We can see from the question that as the temperature was increased from 10° to 20°C the solubility of the solute increased from 170g to 222g per 100g of H2O.
This implies that the solubility of the solute increases with increase in temperature.
If a reaction moves in the forward direction when the temperature is increased, then the reaction is endothermic. If the reaction is endothermic, the sign of change of heat of solution is positive.
What is on the left side of the arrow 2H2+1O2 --> 2H2O
Answer:
The correct answer is - reactants.
Explanation:
In any chemical reaction, there is an arrow that distinguishes the two major components of the chemical equation by placed in between them. These two components are reactants and products.
OftenlThe reactants placed on the left side of a chemical equation and the products placed on the right side of a chemical equation. In this given case, the reactants 2H2 + 1O2 are placed on the left side of the equation.
If 276 g of dinitrogen tetroxide and 64.0 g of hydrazine are mixed, how many grams of nitrogen gas can you produce?
Answer:
84 g of N₂
Explanation:
We begin from the reaction:
N₂O₄ + 2N₂H₄ → 3N₂ + 4H₂O
1st step: Find out the limiting reactant.
We convert the mass to moles.
276 g . 1mol/ 92g = 3 moles of N₂O₄
64 g . 1mol / 32g = 2 moles of hidrazine
Limiting reactant is the hydrazine. Ratio is 1:2, then for 3 moles of tetroixde I may need 6 moles of N₂H₄. (But I only have 2).
To determine the grams of produced nitrogen we see stoichiometry (2:3)
2 moles of hydrazine can produce 3 moles of N₂
Definetaly our 2 moles make 3 moles of gas.
We convert the moles to mass.
3 mol . 28g /1mol = 84 g of N₂
How do magnets move objects?
Answer: Magnets have a force which is known as no contact force. This force tries to attract the metallic objects near it, which makes it move.
Explanation:
Select the correct answer.
When a substance changes from one phase to another, which of the following occurs?
OA. The substance loses or gains heat.
shoes
OB. The average kinetic energy of the substance changes.
OC. The temperature of the substance changes.
OD. The molecular motion of the substance changes.
Reset
Next
D. The molecular motion of the substance changes.
Does anybody know how to find the theoretical yield? you can just do 1 equation
Answer:
its the first part in mass of sodium
Explanation:
:)
Most of the mass of an atom is found in
Answer:
Most of the mass of an atom is found in the nucleus.
Explanation:
20.What do carbon and silicon have in common?
a.They belong to the same column (family), therefore they have the same number of valence electrons.
b.They belong to the same column (family), therefore they have the same number of total electrons.
c.They belong to the same column (family), therefore they have the same number of energy levels.
d.They belong to the same column (family), therefore they have the same number of protons.
What is the name of this molecule?
O A. 1-methylpentane
O B. 1-pentyne
C. cis-1-pentene
O D. Pentane
Answer:
The name of that molecule should be 1-pentyne
so your answr should be B
Explanation:
Molecules are species made up of atoms. The given molecule in the figure is 1-pentyne. Thus, option B is correct.
What is 1-pentyne?1-Pentyne is a chemical compound with the formula C₅H₈, and an internal alkyne group between the first and the second carbon atom.
The molecules consist of twelve bonds including the bonds between the carbon-carbon, and carbon-hydrogen. There is one triple or the alkyne bond present and five carbon hence the name of the molecule is 1-Pentyne.
Therefore, the molecule is option b. 1-Pentyne.
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A chemist analyzes two samples. One sample contains 14g of element x and 6.0 g of element y. The second sample contains 28 g of element x and samples are the same substance
Answer:
Explanation:
Here's the complete question:
A chemist analyzes two samples.One sample contains 14g of element x and 6.0g of element y.The second sample contains 28g of element x and 6.0g of element y. Does it appear that the two samples are the same substance?
The two samples that we are given in the question are different. They are not the same thing because we can deduce that their components ratio are different.
Sample One contains 14g of element x and 6.0g of element y. The ratio of element x to y is 14/6 = 7/3 = 7:3.
Sample Two contains 28g of element x and 6.0g of element y. The ratio of element x to y is 28/6 = 14/3 = 14:3.
Therefore, they have different ratio for their components and are therefore not thesame.
The breaking down or wearing away of rock and soil is known as... A. earthquake
B. global shift C. weathering D. deposition
Answer:
the breaking down of rock is known as weathering
Hey I'm Chloe,
Does anyone know How many sides and Octagon has?
I Tried Researching it but Nothing came up.
What is the correct IUPAC name for CuNO₃?
Answer:
Copper(i) nitrate
Explanation:
That is the correct name.
Answer:
Molecular Formula
Explanation:
When elements are arranged according to increasing atomic number, there is a repeating, regular pattern of properties
This is called
periodic law
group
periodic table
family
Answer:
grpup
Explanation:
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Do temperature and air pressure change in a smooth, gradual way as your balloon flies higher?
Answer:
yes ?
Explanation:
from what I have learned so far, the hair gradually gets thinner and thinner with less oxygen which would change the pressure
9. This type of bond consists of closely packed cations and loosely held valence e- rather than
neutral atoms.
a. lonic
b. Covalent
c. Metallic
d. polyatomic
Which statement is best illustrated in the diagram above regarding how the Sun's energy affects the Earth's surface from June through September in the Northern Hemisphere? The season changes from autumn to winter, daylight hours decrease, and infrared radiation is the weakest during the June solstice. B The season changes from winter to spring, daylight hours increase, and infrared radiation is the weakest during the September equinox. C The season changes from summer to autumn, daylight hours decrease, and infrared radiation is the strongest during the June solstice. The season changes from spring to summer, daylight hours increase, and infrared radiation is the strongest during the September equinox.
Answer:
I'm sorry but there is no diagram above.
In general, what causes a sea breeze?
O
A. The difference in density between land and water
B. The difference in cloud cover between land and water
Ο Ο Ο
C. The difference in specific heat capacity between land and water
D. The difference in elevation between land and water
Answer:
The usual cause of sea breeze is the difference in specific heat capacity between land and water Land heats and cools more quickly than water. What is the cause of a sea breeze? The air over the land is warmed and rises, to a greater temperature than that over the sea.
Explanation:
Your answer is C ! <3
The difference in specific heat capacity between land and water is the cause of sea breeze.
What is sea breeze?land and ocean heat up at different rates, sea breezes often occur during hot, summer days. The land surface warms up more quickly than the water surface during the day. As a result, the air above land is warmer than that over water.
Just to refresh your memory, warmer air is lighter than cooler air. Warm air rises as a result. As a result, the warmer air above the ground is rising. The cooler air above the water is moving across the surface of the land to replace the rising heated air as it rises over the land.
This is the sea breeze, which is seen at the top of the next picture. The land breeze that happens is seen at the bottom of the following picture.
Therefore, The difference in specific heat capacity between land and water is the cause of sea breeze.
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What is true of experimental designs that are used in scientific research? The designs use the same steps in every kind of research. The designs follow a general method that is familiar to all scientists. The designs ensure that the experimental data supports the hypothesis. The designs are kept secret so that others must do their own experiments.. The answer is B.) "The designs follow a general method that is familiar to all scientists."
Answer:
The designs ensure that the experimental.
Explanation:
Scientific research refers to the-fact finding inquiry to answer the questions related to natural processes. A hypothesis is a situation or an assumption that needs to be proved by applying scientific produces. Experimental design refers to the methodology, which is applied to conduct research.
The designs ensure that the experimental data support the hypothesis is the true statement regarding experimental designs that are used in scientific research because an experimental design should be concerned with the fact that it is relevant or appropriate to prove a hypothesis.
Answer:
its c. the designs follow a general method that is familiar to all scientists
Explanation:
which form of molecular motion do liquids experience?
A translation,rotational,& vibrational
B vibrational and rotational
C translational and rotational
D transitional only
Answer:
I'm pretty sure that liquid moves by vibration
Explanation:
I asked my cousin
describe nuclear change please
Answer: Nuclear change is distinct from chemical change in that elements change. In the nuclear change the elements can change from one to another. (Nuclei can break apart to form smaller elements.)
Explanation:
Answer:
A nuclear change is a process by which nuclei of certain isotopes change spontaneously or are forced to change to two or more different isotopes.
Explanation:
The three main types of nuclear change in the matter are radioactive natural disintegration, nuclear fission, and nuclear fusion.
I like blowing up stuff too