What mass (in g)does 7.98 moles of Kr have?

Name: What mass (in g)does 7.98 moles of Kr have?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The molar mass of Kr (krypton) is 83.80 g/mol. To find the mass of 7.98 moles of Kr, we can use the following calculation:

mass = moles x molar mass 
mass = 7.98 mol x 83.80 g/mol 
mass = 668.44 g

Rounding to the nearest gram, we get the answer A) 668 g as the best choice.

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