Answer:
404.47692 g
Explanation:
Na₂CO₃ + Ca(NO₃)₂ ⇒ CaCO₃ + 2NaNO₃
From the coefficients in the balanced chemical equation, we see that the ratio of Ca(NO₃)₂ and 2NaNO₃ is 1:2, so every 1 mol of Ca(NO₃)₂ produces 2 mols of 2NaNO₃.
(4.93 mol NaNO₃)([tex]\frac{Ca(NO3)2}{2NaNO3}[/tex]) = 2.465 mol Ca(NO₃)₂
Then, we need to convert from moles to grams, since we are asked to find the mass of Ca(NO₃)₂. To do this, we need to look up the molar mass of Ca(NO₃)₂, which is 164.088 g/mol.
(2.465 mol Ca(NO₃)₂ ) ( [tex]\frac{164.088 g}{1 mol}[/tex]) = 404.47692 g
Thus, 404.47692 grams of Ca(NO₃)₂ is needed to produce 4.93 mol of 2NaNO₃.
