Question

calculate moles of o atoms in 9.00g of Mg (NO3)2​

Answer 1

Answer:

Since molar mass is a fraction (g/mol), you can divide by multiplying by its reciprocal (mol/g). This makes it easier to see how grams cancel, leaving moles. There is ~0.364 mole of oxygen atoms in 9.00g of Mg(NO3)2.