Which of the following weighs more?

To determine which option weighs more, we need to calculate the mass of each substance based on the number of moles and their respective molar masses.

For hydrogen (H), the molar mass is approximately 1 g/mol. Therefore, 1 mole of hydrogen weighs about 1 gram.

For helium (He), the molar mass is approximately 4 g/mol. Hence, 0.25 moles of helium weigh:

0.25 moles × 4 g/mol = 1 gram.

For neon (Ne), the molar mass is approximately 20 g/mol. Thus, 0.1 moles of neon weigh:

0.1 moles × 20 g/mol = 2 grams.

For carbon (C), the molar mass is about 12 g/mol. Consequently, 0.2 moles of carbon weigh:

0.2 moles × 12 g/mol = 2.4 grams.

Now we can compare the weights:

• 1 mole of hydrogen = 1 gram

• 0.25 moles of helium = 1 gram

• 0.1 moles of neon = 2 grams

• 0.2 moles of carbon =