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Cerrena [4.2K]
3 years ago
14

Science 7 Grade 7. Can anyone please help me answer these science questions?

Chemistry
2 answers:
masha68 [24]3 years ago
6 0
A cellphone battery is a electrical energy 
and a piston in an engine is an thermal energy
NARA [144]3 years ago
4 0
<span>Thermal expansion in a balloon occurs because when the balloon is heated up, the gas molecules will move faster and in greater distance so when if they move faster then they will hit the wall with greater force, will result to expansion.

conduction, convection and radiation are the ways that thermal energy is transferred.

a cellphone battery is an electrical energy, then piston in an engine is mechanical energy </span>
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daser333 [38]
Hello,

I believe that your answer would be <span>B. water freezes
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3 years ago
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What is the mass in grams of 8 moles of Cu?
frez [133]

Answer:

mass = 508 g

Explanation:

Given data:

Number of moles of Cu = 8 mol

Mass in gram = ?

Solution:

Number of moles = mass/molar mass

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Now we will put the values in formula.

8 mol = mass /63.5 g/mol

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Ghella [55]

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USPshnik [31]

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7 0
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how does a decrease in potential energy during a chemical rwaction relate to the temperature of the surroundings​
blondinia [14]

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