3 x 10^-21 moles of an amino acid having molecular mass 200 g mol-1, would have molecules:
Correct answer: C. 1800
- A. 200
- B. 300
- C. 1800
- D. 180
Explanation
Option C is correct.The explanation is given in image.
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
Number of H+ ions when 0.1 mole of sulphuric acid is completely ionized in water:
The pair of species having the same percentage of carbon is:
A carbon compound containing carbon and oxygen has an approximate molar mass equal to 290. On analysis, it is found to contain 50% by mass of each element. Therefore molecular formula of the compound is:
Calculate the number of moles of Mg required to produce 11.212 dm3 of Hydrogen gas at STP when it reacts with HCl solution. The equation for this reaction is: Mg + 2HCl ---> MgCl2 + H2
Mass of 0.25 moles of SO2 is:
For complete combustion, 1 mole of an organic compound requires 8 moles of O2 gas. What could be the formula of the compound?