H2 burns in chlorine to produce hydrogen chloride. The exact mass of Cl2 required to convert 4g H2 into HCI according to the following equation H2+Cl2 ---> 2HCl is:
Correct answer: C. 142 g
- A. 35.5g
- B. 71 g
- C. 142 g
- D. 71.5 g
Explanation
H2 + Cl2-> 2HCl Moles of H2 = mass/mr = 4/2 = 2 The molar ratio of H2 and Cl2 is H2 : Cl2 = 1 : 1 So, moles of Cl2 = 2 moles Mr of Cl2= 35.5 x 2 = 71 g/mole Mass of Cl2 = mole x Mr = 2 x 71 = 142g
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 number of moles of Mg required to produce 11.212dm3 of Hydrogen at SIT when it reacts with HCl solution, are Mg + 2HCI MgCl2 + H2
Signature of the person with lead pencil increased the weight of the paper by 1.2grams. How many atoms of carbon are present?
The mass of H-atom is 1.008 a.m.u. Its mass in kg is:
The most doubtful yield is:
What will be the values of temperature and pressure at standard condition (SIP).
How many atoms of carbon are present in 18g of glucose?