Q: A hospital has 125 deciliters of blood plasma. What is the volume in milliliters?

$$1.25 \times 10^4$ \ \mathrm{mL}$$

Q: Convert 3.5 Gbyte to kbyte. Report your answer with the correct number of significant figures.

$$3.5 \times 10^6$ \ \mathrm{kbyte}$$

Q: Which of the following is the correct equivalence statement for cubic decimeters and cubic meters?

$$1 \ \mathrm{dm^3$} = 1 \times 10$$^{-3}$$ \ \mathrm{m^3$}$$

Question 1

Which of the following is the correct SI base unit for measuring the amount of substance?

Accepted Answer

Mole (mol)

Question 2

A patient is prescribed 1.25 g of amoxicillin, which is available in 250-mg tablets. How many tablets are needed?

Accepted Answer

5 tablets

Question 3

Which of the following correctly expresses 0.0000478 in scientific notation?

Accepted Answer

$$4.78 	imes 10$$^{-2}$$

Question 4

A cube of gold has a length of 2.00 cm on each side. If the density of gold is $$19.32 \ \mathrm{g/cm^3$}$$, what is the mass of the cube?

Accepted Answer

$$155 \ \mathrm{g}$$

Question 5

Which prefix represents $$10^{-6}$$?

Accepted Answer

Micro

Question 6

A hospital has 125 deciliters of blood plasma. What is the volume in milliliters?

Accepted Answer

$$1.25 	imes 10^4$ \ \mathrm{mL}$$

Question 7

Which of the following best describes the difference between accuracy and precision?

Accepted Answer

Accuracy is how close measurements are to the true value; precision is how close measurements are to each other.

Question 8

Convert 3.5 Gbyte to kbyte. Report your answer with the correct number of significant figures.

Accepted Answer

$$3.5 	imes 10^6$ \ \mathrm{kbyte}$$

Question 9

A sample of mercury has a mass of $$1.00 	imes 10^2$ \ \mathrm{g}$$ and occupies a volume of $$7.36 \ \mathrm{cm^3$}. $$What is its density?

Accepted Answer

$$13.6 \ \mathrm{g/cm^3$}$$

Question 10

Which of the following measurements contains the correct number of significant figures for the value 0.00570?

Accepted Answer

3 significant figures

Question 11

A 133-lb patient is prescribed isotretinoin at a dose of $$0.5 \ \mathrm{mg/kg} of $$body weight. How many milligrams of isotretinoin should they receive? (1 lb = 0.454 kg)

Accepted Answer

$$30 \ \mathrm{mg}$$

Question 12

Which of the following is an exact number?

Accepted Answer

There are 12 eggs in a dozen

Question 13

A dose of 240 mg of acetaminophen is prescribed for a 20-kg child. If Children’s Tylenol contains 160 mg per 5.0 mL, how many mL should be administered?

Accepted Answer

7.5 mL

Question 14

Which of the following best describes the meaning of the prefix 'nano'?

Accepted Answer

$$10^{-9}$$

Question 15

A woman was told to take a dose of 1.5 g of calcium daily. If each tablet contains 500 mg, how many tablets should she take?

Accepted Answer

3 tablets

Question 16

Which of the following is the correct equivalence statement for cubic decimeters and cubic meters?

Accepted Answer

$$1 \ \mathrm{dm^3$} = 1 	imes 10$$^{-3}$$ \ \mathrm{m^3$}$$

Question 17

A single 1-oz serving of tortilla chips contains 250 mg of sodium. If an individual ate the entire 13-oz bag, how many grams of sodium would they ingest?

Accepted Answer

3.25 g

Question 18

Which of the following best describes the process of dimensional analysis?

Accepted Answer

A technique for converting one unit to another using conversion factors

Question 19

If a measurement is reported as $$27 \ ^\circ \mathrm{C} \pm 1 \ ^\circ \mathrm{C}$$, what does the $$\pm 1 \ ^\circ \mathrm{C}$$ represent?

Accepted Answer

The uncertainty in the measurement

Question 20

The LD50 of caffeine is $$192 \ \mathrm{mg/kg}. $$How many cups of coffee (100 mg/cup) would a 59 kg person need to drink to reach this threshold?

Accepted Answer

113 cups

Chapter 1: Matter, Energy, and Measurement – GOB Chemistry Study Notes

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