9. If a compound’s empirical formula is CH₂O and its molar mass is 180 g/mol, what is its molecular formula?
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12. How many moles of Na⁺ are in 2.00 L of 1.50 M Na₂SO₄ sol…
12. How many moles of Na⁺ are in 2.00 L of 1.50 M Na₂SO₄ solution?
6. What is the molar mass of glucose (C₆H₁₂O₆)?
6. What is the molar mass of glucose (C₆H₁₂O₆)?
12. How many grams of NH₃ can be produced from 2.0 mol N₂ an…
12. How many grams of NH₃ can be produced from 2.0 mol N₂ and excess H₂ in: N₂ + 3H₂ → 2NH₃?
14. How much heat is absorbed when 25.0 g ice melts at 0°C?…
14. How much heat is absorbed when 25.0 g ice melts at 0°C? ΔHfus = 6.02 kJ/mol
1. What does excess reagent mean?
1. What does excess reagent mean?
3. Why is bond energy important in thermochemistry?
3. Why is bond energy important in thermochemistry?
14. How many moles of CO₂ are formed from 25.0 g CaCO₃ decom…
14. How many moles of CO₂ are formed from 25.0 g CaCO₃ decomposed? CaCO₃ → CaO + CO₂
Which group contains the most reactive nonmetals?
Which group contains the most reactive nonmetals?
Which has larger radius: Cl or Cl⁻?
Which has larger radius: Cl or Cl⁻?