select the meaning of the underlined word in the following sentence we will do more tests as the data so far are inconclusive

HESI A2

Vocabulary HESI A2

1. Select the meaning of the underlined word in the following sentence. We will do more tests, as the data so far are inconclusive.

A. Unsettled
B. Convincing
C. Unfavorable
D. Bewildering

Correct answer: A

Rationale: The word 'inconclusive' in the sentence describes the data as not definitive or final, indicating that further tests are needed to reach a solid conclusion. 'Inconclusive' means not leading to a firm decision or result, making 'unsettled' the most suitable synonym in this context. Choice B, 'convincing,' does not align with the meaning of 'inconclusive' as it suggests that the data is already clear and persuasive, which contradicts the context. Choice C, 'unfavorable,' is not the best fit as 'inconclusive' does not imply a negative or unfavorable outcome but rather indicates a lack of a definitive answer. Choice D, 'bewildering,' does not capture the meaning of 'inconclusive' in this context. Bewildering implies confusion or puzzlement, which is not the intended meaning in the sentence.

2. Which statement is true of a saturated solution?

A. It has more solute than can dissolve in the solvent.
B. It has less solute that can dissolve in the solvent.
C. It has the maximum concentration of the solute dissolved in the solvent.
D. It contains a precipitate that lowers the concentration of the solute in the solvent.

Correct answer: C

Rationale: A saturated solution contains the maximum concentration of solute that can be dissolved in a specific amount of solvent at a particular temperature. Once a solution is saturated, adding more solute will not increase its concentration since the excess solute will not dissolve and will instead form a precipitate, indicating that the solution is at its maximum capacity. Choices A, B, and D are incorrect because a saturated solution has reached its limit in dissolving solute, so it cannot contain more solute than it can dissolve (choice A), less solute than it can dissolve (choice B), or a precipitate that lowers the concentration of the solute in the solvent (choice D).

3. What helps the cell maintain its shape and allows it to adapt?

A. Microfilaments
B. Cytoplasm
C. Cytoskeleton
D. Centrioles

Correct answer: C

Rationale: The cytoskeleton is the correct answer. It provides structural support to the cell, helps maintain its shape, and enables it to adapt to different environments. Microfilaments are part of the cytoskeleton, but they alone do not encompass the entire cytoskeleton's functions. Cytoplasm is the fluid inside the cell where organelles are suspended and is not directly responsible for maintaining cell shape. Centrioles are involved in cell division and do not primarily contribute to maintaining the cell's shape and adaptation.

4. What is the molarity of a solution containing 45 moles of NaCl in 4 liters?

A. 0.11 M NaCl
B. 0.45 M NaCl
C. 1.8 M NaCl
D. 8.9 M NaCl

Correct answer: A

Rationale: To calculate the molarity of a solution, you use the formula: Molarity (M) = moles of solute / liters of solution. In this case, M = 45 moles / 4 L = 11.25 M. The correct answer is 0.11 M NaCl. Choice B is incorrect as it doesn't match the calculated value. Choice C is also incorrect as it is significantly higher than the correct molarity. Choice D is incorrect as it is excessively high compared to the calculated value.

5. What is the meaning of Regulations?

A. Rules for Conduct
B. Official Standards
C. Personal Guidelines
D. Suggestions

Correct answer: A

Rationale: Regulations refer to rules or directives established by authorities to govern conduct or actions. Therefore, the correct answer is A - 'Rules for Conduct.' Choice B, 'Official Standards,' is incorrect as regulations go beyond just setting standards to include specific rules for behavior. Choice C, 'Personal Guidelines,' is incorrect as regulations are not individualized but are generally applicable rules. Choice D, 'Suggestions,' is incorrect as regulations are mandatory and carry legal weight, unlike suggestions which are optional and not binding.