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Svetradugi [14.3K]
3 years ago
13

If I have 7.0 x 10^24 formula units of magnesium chloride, how many grams of chlorine would I have?

Chemistry
1 answer:
REY [17]3 years ago
3 0

Answer:

824 g

Explanation:

First we <u>convert 7.0 x 10²⁴ formula units of magnesium chloride (MgCl₂) into moles</u>, using <em>Avogadro's number</em>:

  • 7.0 x 10²⁴ formula units ÷ 6.023x10²³ formula units/mol = 11.62 mol MgCl₂

There are two Cl moles per MgCl₂ moles, meaning that we have (2 * 11.62) 23.24 moles of Cl

Finally we <u>convert 23.24 moles of chlorine into grams</u>, using <em>chlorine's molar mass</em>:

  • 23.24 mol * 35.45 g/mol = 824 g
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