27g of Al will react with how much mass of O2 to produce Al2O3
Correct answer: D. 24g of oxygen
- A. 8g of oxygen
- B. 16g of oxygen
- C. 32g of oxygen
- D. 24g of oxygen
Explanation
27 g of Al = 1 mole of AlWhen balancing the equation: 4Al + 3O2 → 2Al2O3Look at the mole ratioAl : O24 : 31 : 3/44 moles of Al gives 3 moles of O2Mass of O2 = 3/4 × 32 = 24g
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
A compound has an empirical formula, C2H2O. If the experimental molecular weight is found to be in the range of 160-170, the molecular formula of this compound is: (Atomic weight: C = 12.1, H = 1, O = 16).
Molecular ions are produced by passing a high-energy electron beam or an x-ray beam through:
The total number of neutrons in 5g of H2O are:1 NA = 6.023 x 10^23
An atom is composed of electrons, protons, neutrons and _:
Glucose(C6H12O6) is the most important nutrient in a cell for generating chemical potential energy, what is the mass percent of carbon in 1.5g of sample?
If we are given the mass of a substance ,we can calculate the _ of the other substance with the help of a balanced chemical equation: