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 ($N_A = 6.022\times10^{23}$ formula - units/mol). The number of moles $n$ is given by $n=\frac{N}{N_A}$, where $N = 5.30\times 10^{22}$ formula - units. $n=\frac{5.30\times 10^{22}\text{ formula - units}}{6.022\times 10^{23}\text{ formula - units/mol}}\approx0.0880\text{ mol}$

Step2: Calculate the mass

Use the formula $m = n\times M$, where $M = 261.35\text{ g/mol}$ is the molar mass and $n = 0.0880\text{ mol}$ is the number of moles. $m=0.0880\text{ mol}\times261.35\text{ g/mol}\approx23.0\text{ g}$

Answer:

23.0 g