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Rashid [163]
4 years ago
7

Classify the chemical equation CaCO3 → CaO + CO2

Chemistry
1 answer:
pychu [463]4 years ago
3 0

This is displacement reaction.

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Question 2
vovangra [49]

Answer:

Option e is correct

The heat required to increase the temperature of copper metal by 1 degree is 0.754 j .

Explanation:

Given data:

specific heat of copper = 0.377 j/g.°C

Heat required to increase temperature = ?

Mass of copper = 2.00 g

Change in temperature = 1°C

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Q = m.c. ΔT

Q = 2 g× 0.377 j/g.°C × 1°C

Q = 0.754 j

The heat required to increase the temperature of copper metal by 1 degree is 0.754 j .

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3 years ago
Which action changes the identity of the substance referenced?
DerKrebs [107]
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when you break ice, the ice is still ice.  that water did not change into something else.  when you run a current through copper, the electrons in the copper move due to the voltage but the copper is not changing.  After the circuit stops, the copper wires are still made out of copper (the copper did not undergo a chemical change).  When you melt gold, the gold is only going from solid form to liquid form.  The gold has not changed chemically, it just underwent a phase change.
I hope this helps.  Let me know if anything is unclear.
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Explanation:

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