Mass and Moles of Methane

The video tutorial explains how to calculate the mass of a single methane molecule (CH4). It begins by determining the molar mass of methane using the atomic masses of carbon and hydrogen. The molar mass is then converted to the mass of a single molecule by dividing by Avogadro's number. The final result is presented in grams and kilograms, highlighting the small mass of a single methane molecule.

What is the first step in calculating the mass of a single methane molecule?

• Find the volume of methane.

• Determine the molar mass of methane.

• Calculate the density of methane.

• Measure the temperature of methane.

What is the molar mass of carbon used in the calculation?

• 14.01 g/mol

• 16.00 g/mol

• 12.01 g/mol

• 1.01 g/mol

How many hydrogen atoms are present in a methane molecule?

• Five

• Four

• Three

• Two

What is Avogadro's number used for in this calculation?

• To find the volume of a gas.

• To convert molar mass to the mass of a single molecule.

• To calculate the pressure of a gas.

• To determine the boiling point of methane.

What happens to the unit 'moles' during the conversion process?

• It is squared.

• It cancels out.

• It is added.

• It is multiplied.

What is the mass of one methane molecule in grams?

• 1.67 x 10^-23 grams

• 4.67 x 10^-23 grams

• 3.67 x 10^-23 grams

• 2.67 x 10^-23 grams

How do you convert the mass of a methane molecule from grams to kilograms?

• Divide by 1000

• Multiply by 1000

• Add 1000

• Subtract 1000

What is the mass of one methane molecule in kilograms?

• 4.67 x 10^-26 kg

• 1.67 x 10^-26 kg

• 2.67 x 10^-26 kg

• 3.67 x 10^-26 kg