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KiRa [710]
3 years ago
14

Which of the following examples would be a physical change?

Chemistry
2 answers:
Leto [7]3 years ago
7 0

Answer:

dissolving salt in water

Explanation:

The other three were chemical reactions, but salt in water is the only one that can be reversed, and the only one where the substances remain the same chemically.

Ksenya-84 [330]3 years ago
4 0
B siddolving salt in water
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What is the relationship between the amount of carbon dioxide and the earths average temperature?
Anit [1.1K]

Answer:

carbon dioxide concentration goes down, temperature goes down. Carbon dioxide goes up temp goes up, carbon dioxide is directly related to temperature by insulating it in the earths atmosphere and if there's less of it then the temp would go down.

Explanation:

6 0
2 years ago
What is the density of a liquid if it's volume is 125 mL and it's mass is 50g?
masha68 [24]

Answer:

0.4g/ml

Explanation:

density= mass/volume

density=50g/125ml

density=0.4g/ml

6 0
3 years ago
How can we keep our voices in tip top shape? Please list the three things we can do to help our voices. Which would you say is m
Alisiya [41]

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help our vocos

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3 years ago
Can someone please list one of the groups of representative elements in 1A-7A
Vadim26 [7]

Group 1A(1), the alkali metals, includes lithium, sodium, and potassium. Group 7A(17) the halogens, includes chlorine, bromine, and iodine. hope this helps:)

7 0
3 years ago
A mixture of gases has 0.3000 mol of CO2, 0.2706 mol of SO2 and 0.3500 mol of water vapor. The total pressure of the mixture is
notka56 [123]

Answer:

Partial pressure SO₂ → 0.440 atm

Explanation:

We apply the mole fraction concept to solve this:

Moles of gas / Total moles = Partial pressure of the gas / Total pressure

Total moles = 0.3 moles of CO₂ + 0.2706 moles of SO₂ + 0.35 moles H₂O

Total moles = 0.9206 moles

Mole fraction SO₂ = 0.2706 moles / 0.9206 moles → 0.29

Now, we can know the partial pressure:

0.29 = Partial pressure SO₂ / Total pressure

0.29 = Partial pressure SO₂ / 1.5 atm

0.29 . 1.5atm = Partial pressure SO₂ → 0.440 atm

8 0
4 years ago
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