Find the Density at STP ZnCn_3

$Z n C n_{3}$

Step 1

To find the mass of $1$ mole of $Z n C n_{3}$ look up the atomic mass of each element and multiply it by the number of atoms contained in each element in the molecule.

mass of $1$ mole of $Z n C n_{3}$ $=$ $(mass of Zn)$ + $3 (mass of Cn)$

Step 2

Fill in the atomic masses from the periodic table.

mass of $1$ mole of $Z n C n_{3}$ $=$ $(65.38999938)$ + $3 (285)$

Step 3

Simplify the result.

Multiply $3$ by $285$ .

mass of $1$ mole of $Z n C n_{3} = 65.38999938 + 855 g$

Add $65.38999938$ and $855$ .

mass of $1$ mole of $Z n C n_{3} = 920.38999938 g$

Step 4

One mole of any gas occupies $22.4 L$ at STP (standard temperature and pressure).

$V = 22.4 L$

Step 5

Density is mass over volume.

$\frac{920.38999938 g}{22.4 L}$

Step 6

Factor $920.38999938$ out of $920.38999938 g$ .

$\frac{920.38999938 (g)}{22.4 L}$

Step 7

Factor $22.4$ out of $22.4 L$ .

$\frac{920.38999938 (g)}{22.4 (L)}$

Step 8

Separate fractions.

$\frac{920.38999938}{22.4} \cdot \frac{g}{L}$

Step 9

Divide $920.38999938$ by $22.4$ .

$41.08883925 \frac{g}{L}$

Step 10

Combine $41.08883925$ and $\frac{g}{L}$ .

$\frac{41.08883925 g}{L}$

Find the Density at STP ZnCn_3

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