A chemist determined by measurements that 0.0650 moles of gallium participated in a chemica reaction. Calculate the mass of gallium that participated in the chemica reaction

4.53gm

Explanation: n=m/M

n is # of moles

m is mass

M is molar mass

so m=n*M when you rearrange the equation

There are 9 hydrogen atoms in the given chemical formula.

Explanation:

We are given a chemical formula of ammonia which is

This molecule is formed by the combination of hydrogen and nitrogen atoms.

In 1 mole of ammonia, 1 atom of nitrogen is there and 3 atoms of hydrogen is there.

We are given:

Moles of ammonia = 3

So, 3 atoms of nitrogen is there and 9 atoms of hydrogen is there.

Hence, there are 9 hydrogen atoms in the given chemical formula.