Q: Which of the following is the correct conversion factor to change kilograms to grams?

$$1 \text{ kg} = 1000 \text{ g}$$

Question 1

Which of the following statements best describes a scientific theory?

Accepted Answer

A theory is an explanation or model that holds up over time and may change with new observations.

Question 2

How many significant figures are in the measurement 0.0200 g?

Accepted Answer

3

Question 3

When multiplying $$6.0 	imes 2.1$$, how many significant figures should the answer have?

Accepted Answer

2

Question 4

A student measures the mass of a sample as 21.35 g, 21.34 g, and 21.36 g. The true mass is 21.50 g. Which statement best describes the measurements?

Accepted Answer

The measurements are precise but not accurate.

Question 5

Convert 500.0 mL to liters using the correct number of significant figures.

Accepted Answer

$$0.500 L$$

Question 6

Which of the following is a heterogeneous mixture?

Accepted Answer

Sand and iron filings

Question 7

Which element is a liquid at room temperature?

Accepted Answer

Bromine (Br)

Question 8

What is the atomic number and number of neutrons in $$^{19}F$$?

Accepted Answer

Atomic number: 9, Neutrons: 10

Question 9

A naturally occurring element has two isotopes: 80.10% with a mass of 100.219 amu and 19.90% with a mass of 110.0931 amu. What is the atomic mass of the element?

Accepted Answer

$$102.08$$ amu

Question 10

Which of the following compounds contains a polyatomic ion?

Accepted Answer

Mg(NO$$_3$$)$$_2$$

Question 11

What is the correct name for FeCl$$_3$$?

Accepted Answer

Iron(III) chloride

Question 12

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

(NH$$_4$$)$$_2SO$_4$$

Question 13

Which of the following is a molecular compound?

Accepted Answer

CO$$_2$$

Question 14

What is the correct name for N$$_2O$_5$$?

Accepted Answer

Dinitrogen pentoxide

Question 15

Which of the following statements about metals is FALSE?

Accepted Answer

Metals do not conduct electricity under any conditions.

Question 16

Which of the following is the correct scientific notation for the number 0.000 000 000 372?

Accepted Answer

$$3.72 	imes 10$$^{-10}$$

Question 17

Which of the following is the correct conversion factor to change kilograms to grams?

Accepted Answer

$$1 	ext{ kg} = 1000 	ext{ g}$$

Question 18

Which of the following is the correct formula for calcium hydroxide?

Accepted Answer

Ca(OH)$$_2$$

Question 19

Which of the following elements is a noble gas?

Accepted Answer

Neon (Ne)

Question 20

Which of the following statements about isotopes is TRUE?

Accepted Answer

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

General Chemistry Fundamentals: Scientific Method, Measurement, Atomic Structure, and Chemical Nomenclature

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