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olga55 [171]
2 years ago
15

Identify the mass law that each observation demonstrates. a flashbulb contains magnesium and oxygen before use and magnesium oxi

de afterward, but its mass does not change.
Chemistry
1 answer:
Alla [95]2 years ago
4 0
The mass law is LAW OF CONSERVATION OF MASS.
The law of conservation of mass states that mass, in an isolated system is neither created nor destroy by chemical reaction or physical transformations. 
This implies that, the mass of the chemicals before the reaction will be equal to the mass of the product after the reaction.
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Answer:

D) 6.02 kJ/mol

Explanation:

Hello,

In this case, since 200kJ melted 1.5 kg of ice (2.0kg-0.5kg), we can compute the melted moles:

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Then, we compute the molar enthalpy of fusion by diving the melted moles to the applied heat:

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Hence answer is D) 6.02 kJ/mol.

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3 years ago
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Explanation:

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