Answer:
0.694g
Step-by-step explanation:
To determine the mass of 0.100 moles of lithium, we need to use the molar mass of lithium (Li). The molar mass is the mass of one mole of a substance and is equal to the atomic mass of the element. The atomic mass of lithium (Li) is approximately 6.94 g/mol. Therefore, the correct answer choice is 0.694 g.