ATI RN
chemistry for health sciences Questions
Question 1 of 5
Considering the plot of total mass (y-axis) versus volume (x-axis), which of the following is true?
Correct Answer: A
Rationale: The correct answer is A. The plot of total mass versus volume should be rather linear because the slope measures the density of a liquid. This is because density is defined as mass divided by volume (density = mass/volume).
Therefore, when mass is plotted against volume, the slope of the line represents the density of the liquid. A linear relationship between mass and volume indicates that the density remains constant.
Summary of other choices:
B: The plot being curved upward due to slope measuring density is incorrect.
C: The plot being curved upward due to mass being higher in successive trials is incorrect.
D: The plot being linear because the mass of the beaker stays constant is incorrect.
Question 2 of 5
Which of the following is an example of a quantitative observation?
Correct Answer: A
Rationale: The correct answer is A because it involves a measurable quantity (length) that can be expressed numerically. This is a quantitative observation as it can be described with numbers.
Choices B and C describe qualities (color and appearance) which are qualitative observations.
Choice D provides a quantitative measurement (temperature) but it is not an observation, rather a measurement.
Question 3 of 5
Convert 0494 to L. (54 cm = 1 in., 1 L = 1 )
Correct Answer: A
Rationale:
To convert 0494 to L, we first convert it to inches: 494 cm ÷ 54 cm/in = 9.148 in.
Then, we convert inches to L: 9.148 in × 1 L/54 in = 0.169 L. The correct answer is A: 1.40 101 L, which is the correct conversion of 0.169 L to scientific notation.
Choices B, C, and D are incorrect due to incorrect conversions or not being in scientific notation.
Question 4 of 5
Which of the following metric relationships is incorrect?
Correct Answer: B
Rationale: The correct answer is B: 1 gram = 10^3 kilograms. This is incorrect because 1 kilogram is equal to 1000 grams, not 100 grams. A is correct as 1 microliter is indeed 10^-6 liters. C is correct as 10^3 milliliters equals 1 liter. D is correct as 1 gram is equal to 10^2 centigrams. The incorrect relationship in choice B violates the metric system conversion factor of 1 kilogram being equal to 1000 grams.
Question 5 of 5
What was the price of London petrol in dollars ($) per gallon? (1 gal = 7854 L)
Correct Answer: B
Rationale: The correct answer is B: $2.20 /gal.
To convert the price of London petrol given in British pounds to dollars per gallon, we first need to convert the price from pounds to dollars using the current exchange rate.
Then, we convert the price per liter to price per gallon by multiplying by the conversion factor (1 gal = 3.7854 L). The conversion results in $2.20 /gal.
Choice A ($4.46 /gal) is incorrect because it is not the correct conversion of the given price.
Choice C ($9.05 /gal) is incorrect as it is too high based on the correct conversion.
Choice D ($1.58 /gal) is incorrect as it does not accurately reflect the conversion from pounds to dollars and liters to gallons.