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iVinArrow [24]
3 years ago
13

Energy is needed to break bonds in chemical reactions

Chemistry
1 answer:
NeX [460]3 years ago
7 0

Answer:

This is True

Explanation:

When a chemical reaction occurs, molecular bonds are broken and other bonds are formed to make different molecules. For example, the bonds of two water molecules are broken to form hydrogen and oxygen. Energy is always required to break a bond, which is known as bond energy.

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How many atoms are in a sample of chromium with a mass of 31 grams? O a 2.4 x 1024 atoms of chromium b 3.6 x 1023 atoms of chrom
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Answer:

b. 3.66x10²³ atoms of chromium.

Explanation:

First we calculate how many moles are there in 31 grams of chromium, using its molar mass:

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Then we <u>calculate how many atoms are there in 0.608 moles</u>, using <em>Avogadro's number</em>:

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Explanation:

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