Q: Which of the following is the correct formula to convert Celsius to Fahrenheit?

$$F = C \times \frac{9}{5} + 32$$

Question 1

Which of the following best describes the difference between mass and weight?

Accepted Answer

Mass is the amount of matter in an object, while weight is the force gravity exerts on that object.

Question 2

A student mixes sand and salt together in a beaker. Which type of mixture is formed, and why?

Accepted Answer

A heterogeneous mixture, because the composition varies from point to point.

Question 3

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

Accepted Answer

Burning a piece of wood in a campfire.

Question 4

Which property is intensive and which is extensive? Select the correct pair.

Accepted Answer

Density is intensive; mass is extensive.

Question 5

A sample of water has a mass of $$36.0\ \mathrm{g}$$ and a volume of $$36.0\ \mathrm{mL}. $$What is its density?

Accepted Answer

$$1.00\ \mathrm{g/mL}$$

Question 6

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

Accepted Answer

Matter cannot be created or destroyed in a chemical reaction.

Question 7

Convert $$25.0\ ^\circ\mathrm{C} to $$Kelvin using the correct formula.

Accepted Answer

$$298.15\ \mathrm{K}$$

Question 8

Which of the following is a correct statement about significant figures?

Accepted Answer

Zeros between nonzero digits are always significant.

Question 9

A measurement is recorded as $$0.00820. $$How many significant figures does it have?

Accepted Answer

3

Question 10

Which of the following best describes a plasma?

Accepted Answer

A gaseous state of matter that contains an appreciable amount of electrically charged particles.

Question 11

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

Accepted Answer

Salt dissolved in water.

Question 12

Which of the following is NOT a base SI unit?

Accepted Answer

Liter

Question 13

A student measures the mass of a sample three times and gets values very close to each other, but far from the true value. Which term best describes the measurements?

Accepted Answer

Precise, but not accurate.

Question 14

Which of the following is a correct application of the scientific method?

Accepted Answer

Formulating a hypothesis after making observations and then testing it with experiments.

Question 15

Which of the following is a compound?

Accepted Answer

$$\mathrm{H_2O}$$

Question 16

A sample of gold has a mass of $$96.5\ \mathrm{g}$$ and a volume of $$5.00\ \mathrm{cm^3$}. $$What is the density of gold in $$\mathrm{g/cm^3$}$$?

Accepted Answer

$$19.3\ \mathrm{g/cm^3$}$$

Question 17

Which of the following is a physical property?

Accepted Answer

Melting point

Question 18

Which of the following is the correct formula to convert Celsius to Fahrenheit?

Accepted Answer

$$F = C 	imes \frac{9}{5} + 32$$

Question 19

Which domain of chemistry involves the use of chemical symbols and equations to represent matter?

Accepted Answer

Symbolic domain

Question 20

A student adds $$1.25$$ and $$3.6$$ using the correct number of significant figures. What is the correct answer?

Accepted Answer

$$4.9$$

General Chemistry Fundamentals: Matter, Measurement, and Properties

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