What is the number of moles in 10 grams of H2? (2020)
Practice Questions
Q1
What is the number of moles in 10 grams of H2? (2020)
0.5
1
2
0.25
Questions & Step-by-Step Solutions
What is the number of moles in 10 grams of H2? (2020)
Step 1: Identify the substance. We are working with H2, which is hydrogen gas.
Step 2: Find the molar mass of H2. Each hydrogen atom has a mass of about 1 gram/mol, and there are 2 hydrogen atoms in H2. So, the molar mass of H2 is 1 g/mol + 1 g/mol = 2 g/mol.
Step 3: Use the formula to find the number of moles. The formula is: Number of moles = mass / molar mass.
Step 4: Plug in the values. We have a mass of 10 grams and a molar mass of 2 g/mol. So, Number of moles = 10 g / 2 g/mol.
Step 5: Calculate the number of moles. 10 g divided by 2 g/mol equals 5 moles.
