If 30 mL of H2 and 20 mL of O2 react to form water, what is left at the end of the reaction?
Correct answer: D. 5 mL of O2
- A. 10 mL of H2
- B. 5 mL of H2
- C. 10 mL of O2
- D. 5 mL of O2
Explanation
Step 1:Volume of H2 = 30 ml volume of O2 = 20 ml reaction between H2 and O2 to form water is as follows:H2+12O2⟶H2O 30mL 15 mL reactedStep 2:According to the equation:1ml of H2 reacts with 1/2 mL of O2 to form 1 mL of H2O.So, 30 mL of H2 will react with 15 mL of O2 to form 30 mL of water.Step 3: Therefore, O2 is present in excess.Volume of O2 left = 20−15=5mLThus, 5 mL of O2 will be left behind and H2 is the limiting reagent.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Fundamental Concepts of Chemistry
Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
Practise Fundamental Concepts of Chemistry
894 free Fundamental Concepts of Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Fundamental Concepts of Chemistry questions
Assuming full decomposition, the volume of CO2 released at STP on heating 9.85 g of BaCO3 (Atomic mass of Ba = 137) will be:
The number of ions present in 2.0 L of a solution of 0.8 M K4 [Fe(CN)6] is:
When 16.6 g of KI is treated with an excess of KIO3 in the presence of 6NHCl, ICl is produced. The amount of KIO3 consumed and the ICl formed are:
How many isotopes are present in Palladium?
How many unstable radioactive isotopes have been produced through artificial disintegration?
The total types of fundamental nuclear sub-atomic particles are there in teh nucleus of an atom?