Question

1.42 mole of lithium, Li, has a mass of______________g. (Enter the numerical value, proper number of significant figures, no unit)

Answer 1

Answer: 9.86 grams

Step-by-step explanation:

According to the periodic table, Lithium has a molar mass of 6.9410.

This means that for every 1 mol of Li, there are 6.9410 grams of Li.

So the calculation is: 1.42 mol Li x 6.910 g Li/ 1 mol Li = 9.85622

The proper number of significant figures is three, so your final answer is 9.86 g.