Chemistry Examples

$T a$

Step 1

To find the mass of $1$ mole of $T a$ 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 $T a$ $=$ $(mass of Ta)$

Step 2

Fill in the atomic masses from the periodic table.

mass of $1$ mole of $T a$ $=$ $(180.94999694)$

Step 3

Remove parentheses.

mass of $1$ mole of $T a = 180.94999694 g$

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.

$\frac{180.94999694 g}{22.4 L}$

Step 6

Factor $180.94999694$ out of $180.94999694 g$ .

$\frac{180.94999694 (g)}{22.4 L}$

Step 7

Factor $22.4$ out of $22.4 L$ .

$\frac{180.94999694 (g)}{22.4 (L)}$

Step 8

Separate fractions.

$\frac{180.94999694}{22.4} \cdot \frac{g}{L}$

Step 9

Divide $180.94999694$ by $22.4$ .

$8.07812486 \frac{g}{L}$

Step 10

Combine $8.07812486$ and $\frac{g}{L}$ .

$\frac{8.07812486 g}{L}$