ATI TEAS 7
Chemistry
1. What is the term for the number of moles of solute per liter of solution?
- A. Molarity
- B. Molality
- C. Normality
- D. Concentration
Correct answer: A
Rationale: Molarity is defined as the number of moles of solute per liter of solution. The other choices are different concentration units.
2. Where does most of the chemical digestion and absorption of nutrients occur?
- A. Mouth
- B. Stomach
- C. Small intestine
- D. Large intestine
Correct answer: C
Rationale: Rationale: The small intestine is where most of the chemical digestion and absorption of nutrients occur in the digestive system. This is because the small intestine is lined with villi and microvilli, which increase the surface area available for absorption. Enzymes secreted by the pancreas and bile from the liver aid in breaking down food into smaller molecules that can be absorbed through the intestinal wall into the bloodstream. The stomach primarily functions in the mechanical breakdown of food and the initial stages of protein digestion, while the large intestine is mainly responsible for absorbing water and electrolytes from the remaining indigestible food particles. The mouth is involved in the initial mechanical breakdown of food through chewing and some chemical digestion of carbohydrates by salivary enzymes, but the majority of nutrient absorption occurs in the small intestine.
3. A bar graph shows the number of patients admitted to the ER each day for a week. How do you determine the day with the highest number of admissions?
- A. Find the tallest bar in the graph.
- B. Compare the heights of all bars.
- C. Calculate the average number of admissions per day.
- D. Subtract the lowest number of admissions from the highest.
Correct answer: A
Rationale: The best approach is to find the tallest bar
4. Which element has the lowest electronegativity value?
- A. Oxygen
- B. Fluorine
- C. Helium
- D. Chlorine
Correct answer: C
Rationale: Electronegativity is the tendency of an atom to attract electrons towards itself in a bond. Noble gases like helium have very low electronegativity because their outer electron shell is already full and stable.
5. One staff suggests that they review the pattern of nursing care that they are using, which is
- A. job description
- B. system used to deliver care
- C. manual of procedure
- D. rules to be followed
Correct answer: B
Rationale: The correct answer is B: 'system used to deliver care.' When a staff member suggests reviewing the pattern of nursing care being used, they are referring to the overall system or method in place for delivering care to patients. This includes the processes, protocols, and techniques used to provide nursing care. It goes beyond just following a job description, manual of procedure, or rules. By evaluating and potentially revising the system used to deliver care, staff can ensure that best practices are in place to provide high-quality and effective care to patients.
6. What happens to the momentum of an object when there is no external force acting upon it?
- A. Momentum increases
- B. Momentum decreases
- C. Momentum remains constant
- D. Momentum becomes zero
Correct answer: c
Rationale: In the absence of external forces, momentum remains constant due to the conservation of momentum.
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