the molar mass of barium nitrate (ba(no₃)₂) is 261.35 g/mol. what is the mass of 5.30×10²² formula units of…

Explanation:

Step1: Calculate the number of moles

Use Avogadro's number ($N_A = 6.022\times 10^{23}$ formula - units/mol). The number of moles $n$ of $Ba(NO_3)_2$ is given by $n=\frac{N}{N_A}$, where $N = 5.30\times 10^{22}$ formula - units. $n=\frac{5.30\times 10^{22}}{6.022\times 10^{23}\text{ formula - units/mol}}\approx0.088$ mol

Step2: Calculate the mass

The mass $m$ of a substance is given by $m = n\times M$, where $M$ is the molar mass. Given $M = 261.35$ g/mol and $n\approx0.088$ mol. $m=0.088\text{ mol}\times261.35\text{ g/mol}\approx23.0$ g

Answer:

23.0 g