which of the following sentences shows correct word usage

ATI TEAS 7

English and Language Usage TEAS

1. Which of the following sentences shows correct word usage?

A. It's often been said that work is better than rest.
B. Its often been said that work is better than rest.
C. It’s often been said that work is better than rest.
D. Its often been said that work is better than rest.

Correct answer: C

Rationale: In this sentence, 'It’s' is the contraction for 'it is,' and 'than' is used correctly for comparisons (e.g., better than). Therefore, sentence C is correct because it uses 'It’s' (it is) and 'than' (for comparison) properly. Choices A, B, and D are incorrect. Choice A lacks the necessary apostrophe in 'It's' (it is) and incorrectly uses 'then' instead of 'than.' Choice B incorrectly uses 'Its' (possessive form) instead of 'It’s.' Choice D lacks the necessary apostrophe in 'It's' (it is) and incorrectly uses 'then' instead of 'than.'

2. What is the equivalent of 3.54 millimeters in meters (m)?

A. 0.0354 m
B. 0.00354 m
C. 35.4 m
D. 0.035 m

Correct answer: B

Rationale: To convert millimeters to meters, you need to divide by 1,000 since there are 1,000 millimeters in a meter. Therefore, 3.54 mm ÷ 1,000 = 0.00354 meters. Choice A (0.0354 m) is incorrect as it is 10 times the correct conversion. Choice C (35.4 m) is incorrect as it would be the equivalent of 35,400 millimeters. Choice D (0.035 m) is also incorrect as it is 100 times greater than the correct conversion.

3. What is the periodic law?

A. The statement that the properties of the elements are a periodic function of their atomic numbers.
B. The statement that elements can be arranged in a table where elements with similar properties are grouped together.
C. The statement that elements can be arranged in a table where the atomic number of an element is equal to the number of protons in its nucleus.
D. The statement that elements can be arranged in a table where the atomic mass of an element is equal to the number of neutrons in its nucleus.

Correct answer: A

Rationale: The periodic law states that the properties of elements are a periodic function of their atomic numbers. This means that when elements are arranged in order of increasing atomic number, there is a periodic repetition of their properties. This forms the basis for the modern periodic table. Option B describes the organization of elements in the periodic table, which is related to the periodic law but not the definition of it. Options C and D are incorrect as they describe concepts related to atomic structure (atomic number and atomic mass) rather than the periodic law itself.

4. The chemical equation below is unbalanced. When it is properly balanced, how many molecules of carbon dioxide (CO2) are produced for each molecule of propane (C3H8) in the reaction? 3C3H8 + 5O2 → 3CO2 + 4H2O

A. One Half.
B. Two.
C. Three.
D. Five.

Correct answer: B

Rationale: The balanced chemical equation for the combustion of propane is: 3C3H8 + 5O2 → 3CO2 + 4H2O. This equation shows that for every 3 molecules of propane (C3H8) consumed, 3 molecules of carbon dioxide (CO2) are produced. Therefore, when properly balanced, 3CO2 are produced for each molecule of propane used. Thus, the correct answer is B: Two. Choices A, C, and D are incorrect because they do not reflect the correct stoichiometry as determined by the balanced equation.

5. If , then

A. 1
B. 2
C. 3
D. 4

Correct answer: C

Rationale: If $2x = 6$, then solving for $x$, we have $x = \frac{6}{2} = 3$. So, if $x = 3$, then $x+1 = 3+1 = 4$. Therefore, the value of $x+1$ would be 4.