The mass of O2 required to burn 0.1 mole of C2H5OH is:
Correct answer: D. 9.6 g
- A. 32 g
- B. 3.2 g
- C. 5.6 g
- D. 9.6 g
Explanation
Balanced Chemical Equation:C2H5OH +3O2 ----------- 2CO2 + 3H2OFrom balanced chemical equation, the ratio between C2H5OH and O2 is 1:3. This means ethanol reacts with 3 moles of oxygen.Moles of O2= 3(moles of C2H5OH) Moles of O2=3(0.1) Mass of oxygen= moles(molar mass) =3(0.1)(32)=9.6gSo option D is the correct answer.
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
898 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
The ratio of volume between 4 g of H2 and 32g of CH4 at STP is
What are the number of covalent bonds in 68 g of H2S gas?
The mass of calcium that release the same no. of valence electrons as 23 g of Na:
4.6g of C2H5OH & 3g of C2H6 have:
The complete ionization of 36.5 g of HCI produces H+ ions
The volume occupied by one gram of oxygen gas: