Empirical Formulas
What is the empirical formula of C₂H₄?
CH₂
What is the molecular mass of H₂O?
Answer: 18.02 g/mol
100 Points: A compound has an empirical formula of CH₂ and a molecular mass of 28 g/mol. What is the molecular formula?
Answer: C₂H₄
100 Points: What is Avogadro’s number?
Answer: 6.022 x 10²³
What is the empirical formula of C₆H₁₂O₆ if n = 6?
Answer: CH₂O
What is the molecular mass of CO₂?
Answer: 44.01 g/mol
A compound has an empirical formula of NH₂ and a molecular mass of 48 g/mol. What is the molecular formula?
N3H6
A compound has a molecular formula of H₂O. How many hydrogen atoms are in 3.40 mole of water?
2.05 x 1024
A compound contains 92.3% carbon and 7.7% hydrogen by mass. What is its empirical formula?
CH
Find the molecular mass of a compound with the empirical formula CH₂ and a molecular formula of C₂H₄.
Answer: 28.06 g/mol
A compound has an empirical formula of C₆H₅ and a molecular mass of 154.20 g/mol. What is the molecular formula?
C₁₂H₁₀
300 Points: What is the mass of 1 mole of NaCl?
Answer: 58.44 g/mol