A container containing two moles of liquid ethanol and four moles of oxygen gas were sparked together to form CO2 & H2O. Identify the heating reagent?
Correct answer: A. Oxygen gas
- A. Oxygen gas
- B. Liquid ethanol
- C. Both A and B
- D. None of the above
Explanation
The heating reagent in this reaction is oxygen gas. When ethanol and oxygen gas are sparked together, they undergo a combustion reaction, resulting in the formation of carbon dioxide (CO2) and water (H2O). So, oxygen gas is the heating reagent that reacts with ethanol to produce the desired products.
This question appeared on the KMU Centralized Admission Test 2020 paper, which you can sit online with every answer explained.
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About Limiting and Excess Reactants
Limiting and excess reactants are identified from the balanced chemical equation and the available amounts of each substance. The limiting reactant determines the maximum product formed, while the excess reactant remains after completion, so questions require mole ratios, theoretical yield and sometimes percentage yield calculations.
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