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Degger [83]
2 years ago
12

Some of the physical changes

Chemistry
1 answer:
docker41 [41]2 years ago
6 0

when liquid is cooled it gets converted into its solid form. so,in this the condition is being reversed.so it is reversible change. Similarly,liquid when heated it gets converted into its gaseous form. when,gas is cooled,it gets converted into its liquid form

I think answer is B

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All living organisms are composed of A. at least three cells. B. one or more cells. C. only one cell. D. at least 100 cells.
Strike441 [17]
B. One or more cells
That is the answer I believe!
5 0
4 years ago
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An example of kinetic energy being converted into heat energy
sammy [17]

Answer:

if you drop a water balloon onto the ground, its kinetic energy is converted mostly to thermal energy. If the balloon weighs 1 kilogram and you drop it from about 2 meters, it will heat up by less.

Explanation:

As you say, kinetic energy of large objects can be converted into this thermal energy. For example, if you drop a water balloon onto the ground, its kinetic energy is converted mostly to thermal energy. If the balloon weighs 1 kilogram and you drop it from about 2 meters, it will heat up by less than.

7 0
3 years ago
CaCl2 can be melted to produce calcium metal and give off chlorine gas. The equation for this is CaCl2(l) Ca(s) + Cl2(g). If 277
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Answer:

82g

Explanation:

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227.45 : xg

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4 0
3 years ago
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How are chemicals used in gasoline?
timofeeve [1]

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5 0
3 years ago
746mmHg, 115m^3, 21*C number of moles?
victus00 [196]

Answer:

n = 4678.13 mol

Explanation:

Given data:

Temperature = 21°C

Pressure = 746 mmHg

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Number of moles = ?

Solution:

21+273 = 294 k

746 /760 = 0.982 atm

115×1000 = 115000 L

PV = nRT

n = PV/RT

n =   0.982 atm × 115000 L /0.0821 atm. L. K⁻¹. mol ⁻¹× 294 k

n = 112930 atm. L/24.14 atm. L. mol ⁻¹

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8 0
3 years ago
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