The number of moles in 0.1kg of calcium is:
Correct answer: D. 2.5 mole
- A. 0.0025 mole
- B. 0.25mole
- C. 0.025 mole
- D. 2.5 mole
Explanation
0.1kg is equal to 100g hence 10g of Calcium present 1mole of Ca => 40g of Ca xmole of Ca => 100g of Ca x= 2.5moles of Ca
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
The relative atomic mass of oxygen is 16 amu. What is the mass of 2 mole of oxygen gas?
11.207 dm3 of methane at STP has _ moles of hydrogen atoms:
Correct representation of element with atomic number and atomic mass is:
How many chlorine atoms are in 2 moles of Cl?
Which of the following samples contain the largest number of atoms?
A metal "M" reacts with "S" to form "MS". If 3.6g of M reacts with 0.09 mole of sulfur then what is the name of metal "M"?