Chem 132: Calculate the number of moles in a sample of sodium bromide (NaBr) that contains 2.88 x 10^23 formula units of NaBr. Make sure your answer has the correct amount of significant figures.

 

Question:

Calculate the number of moles in a sample of sodium bromide (NaBr) that contains 2.88 x 10^23 formula units of NaBr. Make sure your answer has the correct amount of significant figures.

Select one:
a. 2.71 x 10^25 0.478 moles of NaBr.
b. 2.09 moles of NaBr.
c. 4.784 x 10^-1 moles of NaBr.
d. 2.090 0.478 moles of NaBr.
e. 0.478 moles of NaBr.

 

 

 

Answer

e. 0.478 moles of NaBr.

 

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