One mole of a substance contains 6.02 x 1023 molecules.The atomic number of Li is 3 and the atomic mass is approximately 7.If you have three moles of Li, how many grams does it weigh?
A) 9
B) 21
C) 7 x 6.02 x 1023
D) 3 x 6.02 x 1023
Correct Answer:
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