Which coefficient is needed in front of nano3 to balance the equation na2s + zn(no3)2 → zns + _nano3?

Coefficient    is the  number   in front of a formula  in a balanced chemical equation.

For equation to balance the  number of  atoms in product side  must  be equal  to  number  of  atoms  in reactant  side.

Putting  coefficient 2   in front  of NaNO3  balance  the equation  therefore the balanced equation.           the answer is 2

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.