Question

PLEASE HELP!! 15POINTS!!! And brainliest

Answer 1

Answer: a. 3.36 L

b. 33.2 g

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

Standard condition of temperature (STP)  is 273 K and atmospheric pressure is 1 atm respectively.

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

$\text{Number of moles of} Fe_2O_3=\frac{16.0g}{159.69g/mol}=0.1mole$

$3O_2(g)+4Fe(s)\rightarrow 2Fe_2O_3(s)$

a. 2 moles of $Fe_2O_3$ are produced by = $3\times 22.4L=67.2L$ of $O_2$

Thus 0.1 moles of  $Fe_2O_3[tex] are produced by =[tex]\frac{67.2}{2}\times 0.1=3.36L$ of $O_2$

b. $3\times 22.4L=67.2L$ of $O_2$ react with = $4\times 55.8=223.2g$ of iron

Thus 10.0 L of $O_2$ react with = $\frac{223.2}{67.2}\times 10=33.2g$ of iron