Chapter 3 Chemistry Quiz

10 Questions | By Ashleyvickers | Updated: Mar 17, 2022 | Attempts: 326

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Chapter 3 Chemistry Quiz - Quiz

While studying Chemistry, the chemical compounds and elements are some of the hardest concepts to understand. However, with a lot of exercises, it can be pretty easy. The Chemical quiz below tests on different reactions.

Questions and Answers

1.

The atomic mass of copper is 63.55. Given that there are only two naturally occurring isotopes of copper. and , the naturally abundance of the isotope must be approximately
- A.
  
  90%
- B.
  
  70%
- C.
  
  50%
- D.
  
  25%
- E.
  
  10%
2.

A compound that contains only C and H was burned in excess oxygen. The following masses were obtained after the complete combustion of the compound in oxygen: 22.0 g of and 18.0 g was produced by the combustion. Identify the correct empirical formula for the hydrocarbon.
- A.
  
  CH
- B.
  
  CH subscript 2
- C.
  
  CH subscript 3
- D.
  
  CH subscript 4
3.

In 1.00 mol of potassium zirconium sulfate trihydrate, , there are
- A.
  
  3 x 6.02 x 10 to the power of 23 hydrogen atoms
- B.
  
  6.02 x 10 to the power of 23 sulfur atoms
- C.
  
  4 x 6.02 x 10 to the power of 23 potassium atoms
- D.
  
  4 moles of oxygen atoms
- E.
  
  4 moles of zirconium atoms
4.

What is the maximum number of moles of that can be produced by the reaction of 0.40 mol of Al with 0.40 mol of
- A.
  
  0.10 mol
- B.
  
  0.20 mol
- C.
  
  0.27 mol
- D.
  
  0.33 mol
- E.
  
  0.40 mol
5.

... (g) + ... (g) --> ... (g) + ... (g)When the equation for the reaction represented above is balanced and all coefficients are reduced to the lowest whole-number terms, the coefficient for (g) is
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  5
- E.
  
  6
6.

A sample of a compound contains 3.21 g of sulfur and 11.4 g of fluorine. Which of the following represents the empirical formula of the compound?
- A.
  
  SF subscript 2
- B.
  
  SF subscript 3
- C.
  
  SF subscript 4
- D.
  
  SF subscript 5
- E.
  
  SF subscript 6
7.

If 0.40 mol of and 0.15 mol of were to react as completely as possible to produce , what mass of reactant would remain?
- A.
  
  0.20 g of H subscript 2
- B.
  
  0.40 g of H subscript 2
- C.
  
  3.2 g of H subscript 2
- D.
  
  4.0 g of H subscript 2
- E.
  
  4.4 g of H subscript 2
8.

How many carbon atoms are contained in 2.8 g of ?
- A.
  
  1.2 x 10 to the power of 23
- B.
  
  3.0 x 10 to the power of 23
- C.
  
  4.6 x 10 to the power of 23
- D.
  
  1.2 x 10 to the power of 24
- E.
  
  6.0 x 10 to the power of 23
9.

... (s) + ... (l) ... (s)When the equation above is balanced and all coefficients are reduced to lowest whole-number terms, what is the coefficient of (l)?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
- E.
  
  5
10.

In which of the following compounds is the mass ratio of chromium to oxygen closest to 1.62 to 1.00?
- A.
  
  CrO3
- B.
  
  CrO2
- C.
  
  CrO
- D.
  
  Cr2O
- E.
  
  Cr2O3