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

$$4.78 	imes 10$$^{-5}$$

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

$$12,500 \ \mathrm{mL}$$

Question 7

Which of the following best describes accuracy in scientific measurement?

Accepted Answer

The closeness of a measurement to the true value

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 the density of mercury?

Accepted Answer

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

Question 10

Which of the following measurements is the most precise?

Accepted Answer

2.500 g

Question 11

A 133-lb patient is prescribed isotretinoin at a dose of $$0.5 \ \mathrm{mg/kg}. $$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

The number of 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 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 15

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

$$3.25 \ \mathrm{g}$$

Question 16

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

Accepted Answer

Precision is how close measurements are to each other; accuracy is how close measurements are to the true value.

Question 17

If a woman has a mass of 115 lb, what is her mass in grams? (1 kg = 2.2 lb)

Accepted Answer

$$52,000 \ \mathrm{g}$$

Question 18

Which of the following is the correct formula for converting Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 19

A chemist synthesized 1.405 g of aspirin in the lab. If a tablet of aspirin contains 350 mg, how many tablets did she prepare?

Accepted Answer

4 tablets

Question 20

Which of the following is the correct equation for density?

Accepted Answer

$$d = \frac{m}{V}$$

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

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