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AveGali [126]
3 years ago
9

Which equation shows a physical change?

Chemistry
2 answers:
enot [183]3 years ago
7 0
H2O(g) --> H2O(s)

This is the change of phase from gas to solid, which is a physical change.

The other equations correspond to chemical changes given that the origin subtances are forming different substances
ludmilkaskok [199]3 years ago
7 0

<u>Answer:</u> The correct equation is H_2O(g)\rightarrow H_2O(s)

<u>Explanation:</u>

A physical change is defined as the change in which there is change in shape and size of the object and no change in the chemical composition of the substance. In this process, no new substance gets formed.

A chemical change is defined as the change in which chemical composition of the substance gets changed and new substance gets formed.

From the given options:

In first three options, new substances are getting formed and hence they are considered as a chemical change.

Only in last option, there is change in the physical state of matter that is change from gaseous state to solid state. No new substance is getting formed.

Hence, the correct equation is H_2O(g)\rightarrow H_2O(s)

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7 0
3 years ago
Describe an experiment to show that pressure acts in all directions in liquids.​
boyakko [2]

We frequently observe kids playing with polythene bags filled with water that have little holes drilled into them at various locations so they can sprinkle water on other kids. Through this experiment, we can say that pressure acts in all directions in liquids.

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Since both liquids and gases may flow, they are both referred to as fluids. Fluids under rest pressure behave uniformly in all directions.

Weather forecasts can be made using barometers. They track the evolution of atmospheric pressure throughout time.

On weather forecast maps, pressure variations appear as an isobar pattern. Predictions are made using these changes in pressure, and they are fairly accurate when combined with wind observations.

<h3>Pressure and depth in liquids</h3>

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3 0
2 years ago
Express 68000 kg in scientific notation
JulsSmile [24]
6.8x10^4
Would be the answer in scientific notation
7 0
3 years ago
Why do atoms of elements take part in chemical reaction?​
Marina CMI [18]

Explanation:

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4 0
4 years ago
To what volume will a 2.33 l sample of gas expand if it is heated from 30.0 ∘c to 300.0 ∘c?
gizmo_the_mogwai [7]
According to Charle's Law,
V/T =  constant
where 
V = volume
T =  absolute temperature.

The law holds when the pressure of an ideal gas is held constant while temperature changes.

V₁ = 2.33 L, initial volume
T₁ = 30°C = 30+273 K = 303 K, initial temperature
T₂ = 300°C = 300+273 K = 573 K, final temperature

The final volume, V₂, is given by
V₂/T₂ = V₁/T₁
V₂ = (573 K)*(2.33/303  L/K)
     =  4.406 L

Answer: 4.41 L

3 0
3 years ago
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