Q: Which of the following is the correct formula for calculating density?

$$\text{Density} = \frac{\text{mass}}{\text{volume}}$$

Q: Which of the following is the correct equality for the prefix 'kilo-'?

$$1\ \text{km} = 1000\ \text{m}$$

Q: What is the correct conversion factor to change centimeters to meters?

$$\frac{1\ \text{m}}{100\ \text{cm}}$$

Q: Which of the following is the correct equality for the cubic centimeter?

$$1\ \text{cm}^3 = 1\ \text{mL}$$

Question 1

Which of the following is the correct formula for calculating density?

Accepted Answer

$$	ext{Density} = \frac{	ext{mass}}{	ext{volume}}$$

Question 2

A student measures the mass of a solid as 8.0 g and its volume as 2.0 mL. What is the density of the solid?

Accepted Answer

$$4.0\ 	ext{g/mL}$$

Question 3

Which of the following numbers is written correctly in scientific notation?

Accepted Answer

$$3.2 	imes 10^4$

Question 4

How many significant figures are in the measurement 0.00450 g?

Accepted Answer

3

Question 5

Which metric prefix represents $$10^{-3}$$?

Accepted Answer

milli-

Question 6

A patient is prescribed 250 mg of a medication. How many grams is this?

Accepted Answer

$$0.250\ 	ext{g}$$

Question 7

Which of the following is an exact number?

Accepted Answer

The number of students in a classroom

Question 8

When multiplying $$2.34 (3 $$sig figs) by $$1.2 (2 $$sig figs), how many significant figures should the answer have?

Accepted Answer

2

Question 9

A graduated cylinder contains 25.0 mL of water. After a metal object is added, the volume rises to 32.5 mL. If the mass of the object is 60.0 g, what is its density?

Accepted Answer

$$2.67\ 	ext{g/mL}$$

Question 10

Which of the following is the correct equality for the prefix 'kilo-'?

Accepted Answer

$$1\ 	ext{km} = 1000\ 	ext{m}$$

Question 11

If a solution contains $$5.0\ 	ext{g} of $$NaCl in $$100.0\ 	ext{g} of $$water, what is the percent (m/m) of NaCl?

Accepted Answer

$$4.76\%$$

Question 12

Which of the following best describes the purpose of using scientific notation in chemistry?

Accepted Answer

To express very large or very small numbers in a concise form

Question 13

A sample has a specific gravity of 1.5. If the density of water is $$1.0\ 	ext{g/mL}$$, what is the density of the sample?

Accepted Answer

$$1.5\ 	ext{g/mL}$$

Question 14

Which of the following is NOT a strategy to improve learning and understanding in chemistry?

Accepted Answer

Cramming all material the night before the exam

Question 15

What is the correct conversion factor to change centimeters to meters?

Accepted Answer

$$\frac{1\ 	ext{m}}{100\ 	ext{cm}}$$

Question 16

A graph shows a straight line with a positive slope. What does this indicate about the relationship between the two variables?

Accepted Answer

As one variable increases, the other also increases

Question 17

Which of the following is the correct way to round 3.456 to two significant figures?

Accepted Answer

3.5

Question 18

If a dosage is 0.5 mg/kg and a patient weighs 70 kg, what is the total dosage required?

Accepted Answer

$$35\ 	ext{mg}$$

Question 19

Which of the following is a measured number?

Accepted Answer

The mass of a sample recorded as 12.3 g

Question 20

Which of the following is the correct equality for the cubic centimeter?

Accepted Answer

$$1\ 	ext{cm}^3 = 1\ 	ext{mL}$$

Fundamental Concepts and Measurements in Chemistry: Study Notes for GOB Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard