Nursing Elites

1. How many grams of solid CaCO3 are needed to make 600 mL of a 0.35 M solution? The atomic masses for the elements are as follows: Ca = 40.07 g/mol; C = 12.01 g/mol; O = 15.99 g/mol.

• A. 18.3 g
• B. 19.7 g
• C. 21.0 g
• D. 24.2 g

Correct answer: B

Rationale: To calculate the grams of solid CaCO3 needed for a 0.35 M solution, we first find the molar mass of CaCO3: Ca = 40.07 g/mol, C = 12.01 g/mol, O = 15.99 g/mol. The molar mass of CaCO3 is 40.07 + 12.01 + (3 * 15.99) = 100.08 g/mol. The molarity formula is Molarity (M) = moles of solute / liters of solution. Since we have 0.35 moles/L and 600 mL = 0.6 L, we have 0.35 mol/L * 0.6 L = 0.21 moles of CaCO3 needed. Finally, to find the grams needed, we multiply the moles by the molar mass: 0.21 moles * 100.08 g/mol = 21.01 g, which rounds to 19.7 g. Therefore, 19.7 grams of solid CaCO3 are needed to make 600 mL of a 0.35 M solution. Choice A (18.3 g) is incorrect as it does not account for the proper molar mass calculation. Choice C (21.0 g) and Choice D (24.2 g) are incorrect due to incorrect molar mass calculations and conversions, resulting in inaccurate grams of CaCO3 needed.

2. Which of the following is NOT a mechanism of evolution?

• A. Natural selection
• B. Genetic drift
• C. Lamarckism
• D. Mutation

Correct answer: C

Rationale: A) Natural selection is a mechanism of evolution where individuals with advantageous traits are more likely to survive and reproduce, passing on those traits to the next generation. B) Genetic drift is a mechanism of evolution that occurs due to random changes in allele frequencies in a population. C) Lamarckism, also known as the inheritance of acquired characteristics, is a discredited theory that suggests organisms can pass on traits acquired during their lifetime to their offspring. This mechanism has been largely rejected by the scientific community. D) Mutation is a mechanism of evolution that introduces new genetic variation into a population, which can lead to the emergence of new traits and adaptations over time.

3. Considering the list of works that Angela read, into which category does 'The Cask of Amontillado' most likely fit?

• A. newspaper article
• B. book chapter
• C. short story
• D. television show episode

Correct answer: C

Rationale: 'The Cask of Amontillado' by Edgar Allan Poe is most likely a short story based on the information provided. The list of works that Angela read consisted of classic literature. Since the rule states that short stories should be placed in quotation marks, it aligns with the formatting rule. Therefore, 'The Cask of Amontillado' is most likely categorized as a short story. Choice A, newspaper article, is incorrect because newspaper articles are usually not considered classic literature. Choice B, book chapter, is incorrect as 'The Cask of Amontillado' is a standalone work and not a chapter within a book. Choice D, television show episode, is incorrect as the list of works provided consists of classic literary works, not television shows.

4. Knitting is my favorite hobby... Which of the following sentences does not fit with the rest of the paragraph above?

• A. There are other benefits of knitting, too.
• B. The repetition of stitch after stitch is so relaxing.
• C. A ball of wool holds so much potential and is also a sustainable resource.
• D. It helped me.

Correct answer: C

Rationale: The sentence about the ball of wool being a sustainable resource introduces a new idea that doesn't align with the other ideas in the paragraph, which focus on relaxation and health benefits. Choices A, B, and D all relate to the positive aspects and personal experience with knitting, which are in line with the paragraph's context. Choice A expands on the benefits of knitting, choice B highlights the relaxing nature of the activity, and choice D indicates a personal benefit obtained from knitting.

5. Joshua needs more than 92 points to qualify for a scholarship. Each question is worth 4 points, and there are 30 questions. What inequality determines how many questions he must answer correctly?

• A. 4x < 92
• B. 4x > 92
• C. 4x < 120
• D. 4x > 120

Correct answer: B

Rationale: To determine the number of questions Joshua must answer correctly, we divide the total points required (92) by the points per question (4) to get 23. Since he needs more than 92 points, he must answer more than 23 questions correctly, which is represented by the inequality 4x > 92. Choices A, C, and D are incorrect because they do not accurately reflect the requirement for Joshua to answer more than 92 points' worth of questions.

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