Answered

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What is the mass of 7.03 x 10- molecules of magnesium nitrate?

Sagot :

maacastrobr

Answer:

173.5 g

Explanation:

This question seems incomplete, as the power by which 10 is increased is missing. I will answer this question assuming the given number of molecules is 7.03x10²³ molecules. A different number of molecules will give a different answer, but the procedure remains the same.

First we convert the given number of molecules into moles, using Avogadro's number:

  • 7.03x10²³ molecules ÷ 6.023x10²³ molecules/mol = 1.17 mol

Then we convert magnesium nitrate moles into grams, using its molar mass:

  • 1.17 mol * 148.3 g/mol = 173.5 g
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