Question 1

Which of the following best describes the difference between a compound and a mixture?

Accepted Answer

A compound is made of two or more elements in fixed, definite proportions, while a mixture is a combination of substances that can vary in proportion.

Question 2

A student measures the mass of a ring as 4.53 g and its volume as 0.212 cm$$^3. $$Based on the density values below, what is the most likely material of the ring?

Gold: 19.3 g/cm$$^3$$
Platinum: 21.4 g/cm$$^3$$
Silver: 10.5 g/cm$$^3$$
Copper: 8.96 g/cm$$^3$$

Accepted Answer

Platinum

Question 3

Which of the following is an example of a physical change?

Accepted Answer

Dry ice subliming to carbon dioxide gas

Question 4

A sample of ethanol has a mass of 78.5 g and a volume of 99.5 mL. What is its density in g/mL?

Accepted Answer

$$0.789 g/mL$$

Question 5

Which of the following statements about the law of conservation of mass is correct?

Accepted Answer

The total mass of reactants equals the total mass of products in a chemical reaction.

Question 6

Convert $$353.50 K to $$degrees Celsius and degrees Fahrenheit.

Accepted Answer

$$80.35\ ^\circ\mathrm{C}$$, $$176.6\ ^\circ\mathrm{F}$$

Question 7

Which of the following is an intensive property?

Accepted Answer

Density

Question 8

A student records the following measurements for the mass of a sample: 10.03 g, 10.01 g, 9.98 g, 10.01 g. The true value is 10.00 g. Which statement best describes the student's measurements?

Accepted Answer

The measurements are both accurate and precise.

Question 9

Which of the following is the correct scientific notation for the number 0.000380?

Accepted Answer

$$3.80 	imes 10$$^{-4}$$

Question 10

A medication is prescribed at a dose of $$0.012 g/lb $$body weight. What is this dose in mg/kg body weight? (1 lb = 0.4536 kg)

Accepted Answer

$$26.5 mg/kg$

Question 11

Which of the following best describes a crystalline solid?

Accepted Answer

Atoms or molecules are arranged in a regular, repeating three-dimensional pattern.

Question 12

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 13

A sample of a liquid has a density of $$1.32 g/cm$^3. $$What volume (in mL) should be measured to deliver a mass of $$68.4 g$$?

Accepted Answer

$$51.8 mL$$

Question 14

Which of the following is an example of a homogeneous mixture?

Accepted Answer

Tea with sugar

Question 15

Which of the following is the correct SI base unit for temperature?

Accepted Answer

Kelvin

Question 16

Which of the following best describes the scientific method?

Accepted Answer

A method of learning based on observation and experimentation.

Question 17

Which of the following is a derived unit in the SI system?

Accepted Answer

Cubic centimeter (cm$$^3)$$

Question 18

A student multiplies $$1.01 	imes 0.12 	imes 53.51 / 96. $$How many significant figures should the answer have?

Accepted Answer

2

Question 19

Which of the following is an example of a systematic error?

Accepted Answer

A balance that is not zeroed, causing all mass measurements to be too high.

Question 20

Which of the following is the correct conversion for $$120$$ meters to centimeters?

Accepted Answer

$$1.2 	imes 10^2$ cm

Chapter 1: Matter, Measurement, and Math – General Chemistry Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard