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Which of the following is NOT a type of chemical reaction?

• Combustion

• Synthesis

• Displacement

• Vaporization

What is the balanced equation for the combustion of methane (CH4)?

• CH4 + O2 → CO2 + H2O

• CH4 + 2O2 → CO2 + 2H2O

• CH4 → CO2 + 2H2O

• CH4 + 3O2 → CO2 + H2O

How many moles of oxygen gas (O2) are needed to completely react with 5 moles of hydrogen gas (H2) according to the balanced equation? 2H2 + O2 → 2H2O

• 2 moles

• 5 moles

• 10 moles

• 15 moles

What is the stoichiometric coefficient of water (H2O) in the balanced equation for the reaction between sulfuric acid (H2SO4) and potassium hydroxide (KOH)? H2SO4 + 2KOH → K2SO4 + 2H2O

• 1

• 2

• 3

• 4

Which of the following is a double displacement reaction?

• 2H2 + O2 → 2H2O

• NaCl + AgNO3 → AgCl + NaNO3

• CH4 + 2O2 → CO2 + 2H2O

• Fe + S → FeS

What is the molar mass of calcium phosphate (Ca3 (PO4)2)?

• 310.18 g/mol

• 278.18 g/mol

• 198.08 g/mol

• 310.18 g/mol

How many moles of carbon dioxide (CO2) are produced when 4 moles of methane (CH4) are combusted?

• 2 moles

• 4 moles

• 8 moles

• 16 moles

What is the empirical formula of a compound containing 40.0% carbon (C), 6.7% hydrogen (H), and 53.3% oxygen (O) by mass?

• CH3O

• C2H6O2

• CH4O2

• C3H8O3

In the reaction 2Al + 6HCl → 2AlCl3 + 3H2, what is the limiting reactant when 4 moles of aluminum (Al) react with 10 moles of hydrochloric acid (HCl)?

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What is the theoretical yield of ammonia (NH3) when 3 moles of nitrogen gas (N2) react with excess hydrogen gas (H2) according to the following balanced equation? N2 + 3H2 → 2NH3

• 2 moles

• 3 moles

• 4 moles

• 6 moles