Question

question 23 (10 points)
what mass (in g) does 3.99 moles of kr have?
144 g
476 g
334 g
240 g
211 g

Explanation:

Step1: Find the molar mass of Kr

The molar mass of Kr (krypton) is \(M = 83.8\space g/mol\).

Step2: Use the formula \(m=n\times M\)

Given \(n = 3.99\space mol\), then \(m=3.99\times83.8\).

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Answer:

334 g