The volume of a gas is 93 mL when the temperature is 91°C. If the temperature is reduced to 0°C without changing the pressure, what will be the new volume of the gas?
A
70 mL

B
100 mL

C
120 mL

D
273 mL

The new volume of the gas is 70 mL (option A)

Explanation:

Step 1: Data given

Volume of the gas = 93 mL = 0.093 L

Temperature = 91 °C = 364 K

The temperature is reduced to 0°C = 273 K

The pressure doesn't change

Step 2: Calculate the new volume of the gas

V1/T1 = V2/T2

⇒with V1 = the initial volume of the gas = 0.093 L

⇒with T1 = the initial temperature of the gas = 364 K

⇒with V2 = the new volume = TO BE DETERMINED

⇒with T2 = the reduced temperature = 273 K

0.093L/364K = V2/273 K

V2 = 0.06975 L = 69.75 mL  ≈ 70 mL

The new volume of the gas is 70 mL (option A)

i believe the answer is three water molecules