Lesson: Chapter - 7

Practice Questions

1. How many moles of hydrogen sulfide are contained in a 35.0 g sample of this gas?

(A) 1.03 mol

(B) 2.06 mol

(C) 6.18 mol

(D) 9.45 mol

(E) 11.3 mol
2. What is the molar mass of ethanol (C2H5OH)?
(A) 34.2
(B) 38.9
(C) 46.1
(D) 45.1
(E) 62.1
3. Ammonia can be produced by the reaction of nitrogen and hydrogen gas. Suppose the reaction is carried out starting with 14 g of nitrogen and 15 g of hydrogen. How many grams of ammonia can be produced?
(A) 17.04 g
(B) 34.08 g
(C) 51.1 g
(D) 85.2 g
(E) 102 g
4. How many atoms of hydrogen are present in 12.0 g of water?
(A) 1.1 × 1023
(B) 2.0 × 1023
(C) 4.0 × 1023
(D) 8.0 × 1023
(E) 4.8 × 1024
5. Which compound contains the highest percent by mass of hydrogen?
(A) HCl
(B) H2O
(C) H3PO4
(D) H2SO4
(E) HF
6. Statement I Statement II
In a balanced equation, the number of moles of each substance is equal. BECAUSE   Once the limiting reagent has been consumed, the reaction can no longer continue.
7. A hydrocarbon (a compound consisting solely of carbon and hydrogen) is found to be 96% carbon by mass. What is the empirical formula for this compound?
(A) C2H
(B) CH2
(C) C3H
(D) CH3
(E) C4H
8. An unknown compound contains the elements C, H, and O. It is known to contain 48% C and 4.0% H by mass. The molar mass of this compound has been determined in the lab to have a value of 200. The molecular formula for this compound is
(A) C2H3O2
(B) C4H6O4
(C) C4H4O3
(D) C8H3O6
(E) C8H8O6
9. When 7.0 g of ethene (C2H4) burns in oxygen to give carbon dioxide and water, how many grams of CO2 are formed?
C2H4 + 3O2 ? 2CO2 + 2H2O
(A) 9.0 g
(B) 22 g
(C) 44 g
(D) 82 g
(E) 180 g
10. Consider the reaction below. What mass of CF4 is formed by the reaction of 8.00 g of methane with an excess of fluorine?
CH4(g) + 4F2(g)? CF4(g) + 4HF(g)
(A) 19 g
(B) 22 g
(C) 38 g
(D) 44 g
(E) 88 g
Back Next

Next to display next topic in the chapter.

Practice Questions

Test Prep Lessons With Video Lessons and Explained MCQ

Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.

Quantitative Aptitude Reasoning English General Knowledge Picture Patterns

About us

EntryTest.com is a test preparation service for students seeking successful career.

About Disclaimer

Quick Test Prep

NUST NET IBA Karachi SAT LUMS LCAT LSE

 

NTS GAT NTS NAT GMAT GRE ACT

Study Abroad

Education Abroad Business Schools MS in USA