Quantitative

What is the molar mass of water (H₂O)?

How many moles are there in 36 g of water (H₂O)? (Molar mass of H₂O = 18 g/mol)

Which of the following represents the correct formula to calculate the number of atoms in a given mass of an element?

If 2 moles of CO₂ contain 6.022 × 10²³ molecules each, how many molecules are there in total?

What is the mass of 3 moles of sodium chloride (NaCl)? (Molar mass Na=23 g/mol, Cl=35.5 g/mol)

Which of the following is the correct mole ratio in the reaction: 2H₂ + O₂ → 2H₂O?

Calculate the number of moles in 44 g of CO₂. (Molar mass C=12 g/mol, O=16 g/mol)

In the reaction 2Mg + O₂ → 2MgO, how many grams of MgO are formed from 24 g of Mg? (Molar mass Mg=24 g/mol, O=16 g/mol)

What is the percentage composition of sulfur in sulfuric acid (H₂SO₄)? (H=1, S=32, O=16)

Which of the following correctly calculates the empirical formula from 40% C, 6.7% H, and 53.3% O by mass?