How are solids and liquids different than gases in terms of volume changes

2 months ago

Solution 1

Guest #3369
2 months ago
They are different substances because in the weight and size, they are different.
in weight gas weighs nothing but every solid is different.
same with liquids.

📚 Related Questions

Question
How many moles and grams of NaOH are needed to dissolve in water to make 4 liters of a 2.0M solution?
Solution 1
The answers are 8.0 moles and 320 grams.
Solution:
Since we are given the concentration of the solution expressed in molarity and the volume of solution, we can use the equation for molarity defined as the number of moles of solute divided by the volume of the solution in liters:
molarity = moles of solute / volume of solution in liters

We rearrange the expression to solve for the number of moles of the solute:
moles of solute = molarity * volume of solution in liters
Substituting the given values, we have
moles of NaOH = (2.0 mol / 1L) * 4L = 8.0 mol

To calculate for the mass of NaOH solute, we will use the molar mass of NaOH that is equal to 40.0 g/mol:
mass of NaOH = 8.0 mol * (40.0g / 1mol) = 320 grams
Question
Please help!!! How would you calculate the % yield of hydrogen if 40.0 grams of magnesium react with an excess of nitric acid producing 1.70 grams of hydrogen gas. Mg + 2 HNO3 → Mg(NO3)2 + H2
Solution 1
Answer is: yield of hydrogen is 51.5%.
Balanced chemical reaction: Mg + 2HNO
₃ → Mg(NO₃)₂ + H₂.
m(Mg) = 40.0g.
n(Mg) = m(Mg) ÷ M(Mg).
n(Mg) = 40 g ÷ 24.3 g/mol.
n(Mg) = 1.65 mol.
From chemical reaction: n(Mg) : n(H₂) = 1 : 1.
n(H₂) = n(Mg) = 1.65 mol.
m(H₂) = 1.65 mol · 2 g/mol.
m(H₂) = 3.3 g.
yield = 1.70 g ÷ 3.3 g · 100% = 51.5%.
n - amount of substance.
M - molar mass.
Solution 2

The percentage yield of Hydrogen is 51.1%

We'll begin by calculating the mass of Mg that reacted and the mass of H₂ produced from the balanced equation.

Mg + 2HNO₃ → Mg(NO₃)₂ + H₂

Molar mass of Mg = 24 g/mol

Mass of Mg from the balanced equation = 1 × 24 = 24 g

Molar mass of H₂ = 2 × 1 = 2 g/mol

Mass of H₂ from the balanced equation = 1 × 2 = 2 g

From the balanced equation above,

24 g of Mg reacted to produce 2 g of H₂.

Next, we shall determine the theoretical yield of H₂.

From the balanced equation above,

24 g of Mg reacted to produce 2 g of H₂.

Therefore,

40 g of Mg will react to produce = (40 × 2) / 24 = 3.33 g of H₂.

Thus the theoretical yield of H₂ is 3.33 g

Finally, we shall determine the percentage yield of H₂.

• Actual yield = 1.70 g
• Theoretical yield = 3.33 g
• Percentage yield =?

Percentage yield = (Actual / Theoretical) × 100

Percentage yield = (1.70 / 3.33) × 100

Percentage yield of H₂ = 51.1%

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Question
if 392cm2 of helium at 32C and 925 torr are cooled to -15C and the pressure is reduced to 775 torr, calculate the new volume the gas will occupy
Solution 1
Solution:
Assuming ideal behavior of the helium gas, we can use the universal gas law equation
P1V1/T1 = P2V2/T2
The terms with subscripts of one represent the given initial values while for terms with subscripts of two represent the final conditions.
We rearrange the gas law equation to calculate for the new volume V2:
V2 = P1V1T2 / P2T1
We can now substitute the values to the expression. Therefore,
V2 = (925torr * 392cm3 * 258.15K) / (305.15K * 775torr)
V2 = 396 cm³ or 396 553 mL
Question
What evidence of a chemical reaction might you see in the following cases? * Bleaching a stain * Burning a match. *rusting of an iron nail
Solution 1
In bleaching a stain, you see that the stain fades, and doesn't come back, which indicates that it has undergone a change.

Buring a match, you would see the ashes, and that it cannot be it's original substance again.

In rusting of an iron nail, the nail cannot be unrusted easily, which indicates that it has been through a chemical reaction.
Solution 2
ALL OF THE ABOVE ARE CHEMICAL CHANGE WHICH IS IREVERSIBLE TO THE ORIGINAL STATE
Question
Write the proper word equation to express the following chemical reaction: 4Fe (s) + 3Sn(NO3)4 (aq) Imported Asset 4Fe(NO3)3 (aq) + 3Sn
Solution 1
The proper word equation  for

4Fe + 3Sn(NO3)4  = 4Fe(NO3)3 + 3Sn  is as below

Iron + Tin (iv) nitrate =  iron(iii) nitrate + Tin

iron displaces  tin from it compound ( Tin (iv) nitrate to form iron (iii) nitrate and tin.

from the equation above 4 moles of Fe  displaces  3 moles of Sn(NO3)4 to form 4 moles of Fe(NO3)3 and  3 moles of SN
Question
how many parts per million of mercury are there in a sample of tap water with a.mass of 750 g containing 2.2 mg of hg
Solution 1
Parts Per Million is defined as the number of parts of a solute per one million parts of a solution.

ppm  =  (Weight of Solute / Weight of Solution) × 10⁶

Data Given;
Weight of Solute (Hg)  =  2.2 mg  =  0.0022 g

Weight of Solution (Tap Water)  =  750 g

Putting Values,

ppm  =  (0.0022 g / 750 g) × 10⁶

ppm  =  2.93 × 10⁻⁶ × 10⁶

ppm  =  2.93

Result:

It means if given tap water is containing 1 million particles then 2.93 particles in that are of Hg.
Question
2) Pick the statement about the Bohr model of the hydrogen atom that is NOT true. A) The energy of each Bohr orbit is quantized. B) An electron in a stationary state does not emit radiation. C) When an electron jumps to a higher state, energy is absorbed. D) When an electron jumps from one state to another, the electron must gain or lose just the right amount of energy to actually travel the distance between the orbits.
Solution 1

Answer: When an electron jumps from one state to another, the electron must gain or lose just the right amount of energy to actually travel the distance between the orbits.

Explanation:

Bohr in his structure of atom explained that protons which are positively charged particles and neutrons which are neutral particles,  are contained in the center of an atom called as nucleus.

The electrons which are negatively charged particles revolve around the nucleus in fixed orbit or shell or energy levels which are termed as quantized. These energy levels are stable and are stationary along with different energy value.  The electron remains in the state until energy is absorbed or released.

The electrons absorb energy when it moves from lower energy state to higher energy state. The electrons lose energy when it moves from higher energy state to lower energy state and thus emit radiations corresponding to the energy gap.

Thus the statement  when an electron jumps from one state to another, the electron must gain or lose just the right amount of energy to actually travel the distance between the orbits is incorrect because energy is absorbed when electron jumps from one state to another.

The energy is lost when electron falls from one state to another.

Solution 2

Explanation:

I put that on usa test prep and it says correct. the other person who answered this is wrong

Question
Can producers function without sunlight? Why or Why not?
Solution 1
The answer is no because producers need the energy from the sun in order to produce. Hope this helped!
Question
Dalton theorized that matter is made of tiny, indivisible particles called atoms. In what way did the theories of each of these scientists support or differ from Dalton's theory? K/U (a) J. J. Thomson (b) Ernest Rutherford (c) James Chadwick
Solution 1

Electrons are scattered in an atom which was given by J.J Thomson in his plum pudding model.  J. J. Thomson, Ernest Rutherford and James Chadwick all supported the Dalton's model.

What are Postulates of Dalton's atomic theory?

Dalton's atomic theory was regarding atoms. Following are the postulates of Dalton's atomic theory

a) Atom are indivisible and are the smallest unit of any matter.

b) Atoms of same element have same mass.

c) Atoms of different elements differ in mass.

d) Elements combines with each other in whole number to form compounds.

Thomson matched the atomic structure to the water melon. The red part is positively charged and black seeds are the electrons embedder in that. Rutherford told that atom consist of nucleus and electrons revolves around the nucleus. Chadwick discovered the neutron that is present in the ucleus.

Therefore,  J. J. Thomson, Ernest Rutherford and James Chadwick all supported the Dalton's model.

To know more about Dalton's atomic theory, here:

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Solution 2
A. J.J. Thomson hope this helps
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Which substance is insoluble and floats in water? A) Ice shavings B) Wood shavings C) Salt crystals D) Sugar crystals
Solution 1
Wood shavings will float

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