Q: A laboratory sample has a mass of $$2.50 \ \text{mg}. $$What is this mass in kilograms?

$$2.50 \times 10$$^{-6}$$ \ \text{kg}$$

Q: A patient receives a dose of $$0.250 \ \text{g} of a $$medication. How many micrograms is this?

$$2.50 \times 10$$^{5}$$ \ \mu\text{g}$$

Q: A sample contains $$3.00 \times 10$$^{12}$$ picograms of a substance. How many grams is this?

$$3.00 \times 10$$^{-3}$$ \ \text{g}$$

Question 1

A laboratory sample has a mass of $$2.50 \ 	ext{mg}. $$What is this mass in kilograms?

Accepted Answer

$$2.50 	imes 10$$^{-6}$$ \ 	ext{kg}$$

Question 2

Which of the following correctly matches the metric prefix with its meaning?

Accepted Answer

Mega: $$10^{6}$$

Question 3

A patient receives a dose of $$0.250 \ 	ext{g} of a $$medication. How many micrograms is this?

Accepted Answer

$$2.50 	imes 10$$^{5}$$ \ \mu	ext{g}$$

Question 4

Which statement about isotopes is correct?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 5

Chlorine has two naturally occurring isotopes: $$^{35}	ext{Cl} (75.78$$%, mass = 34.969 u) and $$^{37}	ext{Cl} (24.22$$%, mass = 36.966 u). What is the atomic weight of chlorine?

Accepted Answer

$$35.45 \ 	ext{u}$$

Question 6

Which of the following elements is a halogen?

Accepted Answer

Chlorine

Question 7

Which of the following is the empirical formula for glucose ($$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6$$)?

Accepted Answer

$$\mathrm{CH}_2\mathrm{O}$$

Question 8

Which of the following is a correct name for the compound $$\mathrm{FeCl}_3$$?

Accepted Answer

Iron(III) chloride

Question 9

What is the correct name for $$\mathrm{N}_2\mathrm{O}_5$$?

Accepted Answer

Dinitrogen pentoxide

Question 10

Which of the following is the correct formula for sulfuric acid?

Accepted Answer

$$\mathrm{H}_2\mathrm{SO}_4$$

Question 11

Which of the following is the correct name for $$\mathrm{CH}_3\mathrm{CH}_2\mathrm{OH}$$?

Accepted Answer

Ethanol

Question 12

Which of the following is an isomer of $$\mathrm{C}_4\mathrm{H}_{10}$$?

Accepted Answer

2-methylpropane

Question 13

A compound is found to contain 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is its empirical formula?

Accepted Answer

$$\mathrm{CH}_2\mathrm{O}$$

Question 14

Which of the following best describes the difference between an alkane and an alcohol?

Accepted Answer

An alcohol contains a hydroxyl group ($$-\mathrm{OH}) $$while an alkane contains only single-bonded carbon and hydrogen atoms.

Question 15

Which of the following is the correct name for $$\mathrm{C}_3\mathrm{H}_8$$?

Accepted Answer

Propane

Question 16

What is the correct name for $$\mathrm{HNO}_3$$?

Accepted Answer

Nitric acid

Question 17

A sample contains $$3.00 	imes 10$$^{12}$$ picograms of a substance. How many grams is this?

Accepted Answer

$$3.00 	imes 10$$^{-3}$$ \ 	ext{g}$$

Question 18

Which of the following is the correct name for $$\mathrm{H}_2\mathrm{CO}_3$$?

Accepted Answer

Carbonic acid

Question 19

Which of the following statements about the periodic table is correct?

Accepted Answer

Elements in the same group have similar chemical properties.

Question 20

Which of the following is the correct formula for the compound formed between magnesium and nitrogen?

Accepted Answer

$$\mathrm{Mg}_3\mathrm{N}_2$$

General Chemistry Quiz 2 Study Guidance

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