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mars1129 [50]
3 years ago
5

_________ refers to the total energy of a system.

Chemistry
2 answers:
makkiz [27]3 years ago
6 0

Answer:   a. Enthalpy

Explanation:

inna [77]3 years ago
3 0
    Enthalpy refers to the total energy of a system. Hope this helped!
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How does reactants in photosynthesis combine to make atoms molecules
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Explanation:

Photosynthesis

Photosynthesis

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2 years ago
How many moles of H2 can be made from complete reaction of 3.0 moles of Al?
tresset_1 [31]

Answer: 4.5 moles of H_{2} can be made from complete reaction of 3.0 moles of Al.

Explanation:

The given reaction equation is as follows.

2Al + 6HCl \rightarrow 2AlCl_{3} + 3H_{2}

This shows that 2 moles of Al reacts with 6 moles of HCl. So, the amount of HCl required to react with 1 mole Al is three times the amount of HCl.

Therefore, 3 moles of Al will react with 9 moles of HCl to give 3 moles of AlCl_{3} and \frac{9}{2} moles of H_{2}.

The reaction equation now will be as follows.

3Al + 9HCl \rightarrow 3AlCl_{3} + \frac{9}{2}H_{2}

The moles \frac{9}{2} can also be written as 4.5 moles.

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3 years ago
How many total elements are in marble?
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