Question

how many moles of sodium are there in 3.41 moles of the following compounds

NaCl

Na2SO4

Na3PO4

NaNO3

Answer 1

Let x be the number of moles of Na in 3.41 moles of Nacl

1 mole of NaCl has----------> 1 mole of Na

3.41 moles of Nacl has----------> x moles of Na

Cross multiply

X=3.41 moles of Na

Let x be the number of moles of Na in 3.41 moles of Na2SO4

1 mole of Na2SO4 has----------> 2 moles of Na

3.41 moles of Na2SO4 has----------> x moles of Na

Cross multiply

X=3.41*2 moles of Na=6.82 moles of Na

Let x be the number of moles of Na in 3.41 moles of Na3PO4

1 mole of Na3PO4 has----------> 3 moles of Na

3.41 moles of Na3PO4 has----------> x moles of Na

Cross multiply

X=3.41*3moles of Na=10.23 moles of Na

Let x be the number of moles of Na in 3.41 moles of Nacl

1 mole of NaNO3 has----------> 1 mole of Na

3.41 moles of NaNO3 has----------> x moles of Na

Cross multiply

X=3.41 moles of Na