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Which type of reaction is represented by: 2Na + Cl₂ → 2NaCl?

Which statement best describes how a catalyst or enzyme affects a chemical reaction?

Which type of intermolecular force is the weakest?

In LiOH + CO₂ → LiHCO₃, if the theoretical yield is 78.2 g LiHCO₃ and the actual yield is 72.8 g, the percent yield is:

For Fe + S → FeS // how many moles of S are required to react with 1.42 mol Fe?

For SiO₂ + 3C → SiC + 2CO, if 70.0 g SiO₂ and 50.0 g C react, what mass of CO can form? (MM CO = 28.01 g/mol)

Which of the following is a balanced equation?

For the endothermic reaction A → B with ΔH = +125 kJ, which statement is TRUE?

A syringe contains gas at 760 mmHg in a 1.00 L chamber. If the plunger is pushed to 500. mL while the temperature remains constant, what is the new pressure?

When 54.6 g of C₂H₂ burns, how many grams of CO₂ form? Balanced: 2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O (MM: C₂H₂ = 26.04 g/mol; CO₂ = 44.01 g/mol)