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Nursing Elites

ATI TEAS 7

Chemistry

1. What is the net ionic equation for the reaction: 2HCl(aq) + Ba(OH)2(aq) → 2H2O(l) + BaCl2(aq)?

Correct answer: a

Rationale: The net ionic equation includes only the species that undergo a change during the reaction.

2. A ball is rolling across the floor and comes to a stop on its own. What force caused the ball to stop?

Correct answer: C

Rationale: In the absence of other forces, air resistance will gradually slow down the ball until it stops.

3. Fingernails and toenails are made primarily of:

Correct answer: B

Rationale: The correct answer is B: Keratin. Fingernails and toenails are primarily made of a tough protein called keratin. Keratin is a fibrous structural protein that also makes up hair and the outer layer of skin. Collagen, as mentioned in option A, is found in the dermis of the skin and is responsible for providing strength and elasticity to the skin. Melanin, as in option C, is a pigment that gives color to the skin, hair, and eyes, but it does not contribute to the structure of nails. Sebum, as in option D, is an oily substance produced by the sebaceous glands in the skin to moisturize and protect the skin, but it is not a component of nails.

4. The tiny air sacs in the lungs where gas exchange takes place are called:

Correct answer: A

Rationale: The correct answer is C: 'Alveoli.' Alveoli are the tiny air sacs in the lungs where gas exchange takes place. Oxygen from the air is diffused into the blood, and carbon dioxide from the blood is diffused into the air in the alveoli. Bronchi (option A) are the large air passages that lead from the trachea into the lungs. Trachea (option B) is the windpipe that connects the larynx to the bronchi. Pleura (option D) is a thin membrane that surrounds the lungs and lines the chest cavity. Understanding these structures is essential for comprehending respiratory function and gas exchange in the human body.

5. Which of the following factors would increase the solubility of a gas in a liquid?

Correct answer: b

Rationale: Henry's law states that the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid. The other choices would typically decrease solubility.

6. "Ironic" and "serious" are:

Correct answer: B

Rationale: "Ironic" means the opposite of "serious."

Similar Questions

"Ironic" and "serious" are:
What phenomenon explains the bending of light as it passes around an obstacle or through an aperture?
Which term describes the point where parallel rays of light converge or appear to diverge from after passing through a lens or reflecting off a mirror?
Identify the preposition in the following sentence: The cat jumped over the fence.
Identify the type of error in the sentence "They went to the store, and bought groceries, then went home."
What is the meaning of the idiom "to cross that bridge when we come to it"?

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