Moles and Stoichiometry

What is the definition of mole?

• the amount of a substance containing the same number of atoms in 1 gram of carbon.

• the amount of a substance containing the same number of atoms in exactly 12 grams of carbon.

• the amount of a substance containing the same number of atoms in 1 gram of any atom.

Calculate the molar mass of vitamin C (C₆H₈O₆).

• 360

• 176

• 174

• 352

Calculate the mole of 1.20 grams of carbon atom.

• 0.10 mol

• 0.010 mol

• 1.00 mol

• 1.01 mol

Calculate the mol in 0.71 gram of chlorine gas (Cl₂)

• 1.01 mol

• 1.10 mol

• 0.10 mol

• 0.010 mol

Calculate the mol of 2.93 grams of sodium chloride powder (NaCl).

• 0.5 mol

• 0.05 mol

• 0.005 mol

• 5.00 mol

Calculate the mass of 1 mole of water (H₂O).

• 16

• 17

• 18

• 36

Calculate the mass of 0.88 mole of carbondioxide gas (CO₂).

• 38.7 gram

• 24.6 gram

• 3.87 gram

• 2.46 gram

Calculate the mass of 0.45 mol of glucose (C₆H₁₂O₆).

• 7.83 gram

• 78.3 gram

• 8.1 gram

• 81 gram

Nitrogen gas (N₂) and hydrogen gas (H₂) reacts in 1:3 ratio.
If Keeva has 2.7 mol of hydrogen, how much mol of nitrogen she needs for them to react completely?

• 0.9

• 2.7

• 1

• 3

To burn 1 mol of methane (CH₄), Malvin would need 2 moles of oxygen (O₂).
How much mole of oxygen he would need to burn 0.05 mole of methane?

• 2

• 0.10

• 0.2

• 1