Question

The numbers of moles present in 165 g of Manganese is a. 3.15 moles c. 3.00 moles b. 0.300 moles d. 30 moles Please select the best answer from the choices provided A B C D

Answer 1

We need to first find the molar weight of manganese, found on the periodic table. Using a periodic table, we find that manganese has a molar weight of 54.938g/mol.

So in order to find the number of moles present in 165g, we must multiply and cancel out units:

$\frac{1mole}{54.938g}*165g=3.00mol_{Mn}$

Therefore, we now know that 165g of manganese produces C) 3.00 moles.