Question

How many grams are in 3.45 × 1022 formula units of NaNO3?

Answer 1

4.87 g

Step-by-step explanation:

Step 1: Calculate the moles of sodium nitrate

Considering the Avogadro's number, in 1 mole of sodium nitrate there are 6.02 × 10²³ formula units of sodium nitrate. We will use this ratio to find the moles corresponding to 3.45 × 10²² formula units.

`3.45 * 10^(22) FU * (1mol)/(6.02 * 10^(23) FU) =0.0573mol`

Step 2: Calculate the mass corresponding to 0.0573 moles of sodium nitrate

The molar mass of sodium nitrate is 84.99 g/mol. The mass corresponding to 0.0573 moles is:

`0.0573 mol * (84.99g)/(1mol) = 4.87 g`