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Svetach [21]
3 years ago
6

Reactions which give out energy are endothermic

Chemistry
1 answer:
zvonat [6]3 years ago
7 0
Only if it's heat energy

But yes, indeed :)
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Answer:

The molar mass of carbon

Explanation:

Before the mass (in grams) of two moles of carbon can be determined, <u>the molar mass of the element would be needed.</u>

<em>This is because the number of mole of an element is the ratio of its mass and the molar mass</em>. That is,

number of mole = mass/molar mass

Hence, the mass of elements can be obtained by making it the subject of the formular;

mass = number of mole x molar mass

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