Question

Calculate the volume of 0.15 mole of Br2. The density of Br2 is 3.12 g/mL.

Answer 1

we know that Br = 80

its mass would be Br2 × moles = 160 × 0.15= 80

density. = mass / volume

3.12 = 80 / volume

volume = 80 / 3.12

volume = 25.64 ml


hope it helps!

Answer 2

Answer: The volume of $Br_2$ is 7.692 mL.

Explanation:

Density is defined as the ratio of object's mass and volume.

Mathematically,

$\text{Density}=\frac{\text{Mass}}{\text{Volume}}$   .....(1)

To calculate the mass of bromine, we use the formula:

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

Given mas of $Br_2$ = ?g

Molar mass of $Br_2$ = 160 g/mol

Moles of $Br_2$ = 0.15 mole

Putting values in above equation, we get:

$0.15=\frac{\text{Mass of }Br_2}{160g/mol}\\\\\text{Mass of }Br_2=24g$

Density of $Br_2$ = 3.12 g/mL

Putting values in equation 1, we get:

$0.15g/mL=\frac{24g}{Volume}\\\\\text{Volume of }Br_2=7.692mL$

Hence, the volume of $Br_2$ is 7.692 mL.