Question

A reaction at evolves of boron trifluoride gas.Calculate the volume of boron trifluoride gas that is collected. You can assume the pressure in the room is exactly . Round your answer to significant digits.

Answer 1

Answer:

3.10 L

Explanation:

A reaction at 11.0°C evolves 133.mmol of boron trifluoride gas. Calculate the volume of boron trifluoride gas that is collected. You can assume the pressure in the room is exactly 1 atm. Round your answer to 3 significant digits.

Step 1: Convert the temperature to the Kelvin scale

When working with gases, we must use the absolute temperature scale. We can convert the temperature from Celsius t Kelvin using the following expression.

K = °C + 273.15

K = 11.0°C + 273.15

K = 284.2 K

Step 2: Convert the amount of matter to moles

We will use the conversion factor 1 mol = 1000 mmol.

133 mmol × (1 mol/1000 mmol) = 0.133 mol

Step 3: Calculate the volume of boron trifluoride gas

We will use the ideal gas equation.

P × V = n × R × T

V = n × R × T / P

V = 0.133 mol × (0.0821 atm.L/mol.K) × 284.2 K / 1 atm

V = 3.10 L