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Ksenya-84 [330]
3 years ago
15

Liquids: A) must be contained to stay in one spot B) have a variable volume, but a fixed mass C) are usually more dense than sol

ids and gases D) cannot be changed into gases
Chemistry
2 answers:
Margaret [11]3 years ago
8 0
B). Have a variable volume, meaning they fill up the area they are in.
koban [17]3 years ago
3 0

Answer:

B) have a variable volume, but a fixed mass

Explanation:

Option A in incorrect. Liquids have flow.  

Option B is correct. Liquids take the shape of the container in which they are kept, so they have a variable volume. Liquids have a fixed mass as mass is the amount of matter in a substance.  

Option C is incorrect. Liquids are less dense than solids but more dense than gases.  

Option D is incorrect. Liquids can change into gases by a process known as vaporization.  

 

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andrew-mc [135]
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3 years ago
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A balloon occupies a volume of 2.00 l at 40.0oc. how much volume will it occupy at 30.0oc?
hodyreva [135]
<span>Charles' law says "at a constant pressure, the volume of a fixed amount of gas is directly proportional to its absolute temperature".

V </span>α T

Where V is the volume and T is the temperature in Kelvin of the gas. We can use this for two situations as,
V₁/T₁ = V₂/T₂

V₁ = 2.00 L
T₁ = 40.0 ⁰C = 313 K
V₂ = ?
T₂ = 30.0 ⁰C = 303 K

By applying the formula,
2.00 L / 313 K = V₂ / 303 K                   
                   V₂ = (2.00 L / 313 K) x 303 K
                   V₂ = 1.94 L

Hence, the volume of the balloon at 30.0 ⁰C  is 1.94 L
7 0
3 years ago
Which statement correctly describes the relationship between air temperature and air pressure?
grigory [225]

Answer:

-Warm air sinks, creating an area of low pressure.

Explanation:

Heat will weigh more, than cool air!

7 0
3 years ago
Most substances become less dense as the temperature increases. Which substance is an exception to this rule
stealth61 [152]
The substance is water
6 0
3 years ago
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What is the mass percent of potassium sulfate in solution if 78g of potassium sulfate is dissolved in 500 mL of water? (The dens
Debora [2.8K]

Answer:

13.5 %

Explanation:

First we<u> calculate the mass of 500 mL of water</u>, using <em>its density</em>:

  • Volume * Density = Mass
  • 500 mL * 1.00 g/mL = 500 g

Then we <u>calculate the mass percent of potassium sulfate</u>, using the formula:

Mass of Potassium Sulfate / Total Mass * 100%

  • 78 g / (78 + 500) g * 100 % = 13.5 %

6 0
2 years ago
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