Q: Which of the following is the correct definition of density?

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

Question 1

Which of the following is an example of a quantitative measurement in chemistry?

Accepted Answer

The mass of a sample is 12.5 grams.

Question 2

Which temperature scale has no negative values?

Accepted Answer

Kelvin

Question 3

A graduated cylinder contains a liquid with the meniscus between 4.5 and 4.6 mL. If the cylinder is marked every 0.1 mL, what is the correct measurement to record?

Accepted Answer

4.56 mL

Question 4

Which of the following numbers has three significant figures?

Accepted Answer

0.0310

Question 5

What is the correct number of significant figures in the measurement 0.04450 meters?

Accepted Answer

4

Question 6

Which metric prefix multiplier is most appropriate for reporting a measurement of 0.000001 meters?

Accepted Answer

micro

Question 7

A student measures the mass of a sample several times and gets values that are very close to each other, but not close to the actual mass. This is an example of:

Accepted Answer

Low accuracy, high precision

Question 8

Which equation is used to convert Celsius temperature to Kelvin?

Accepted Answer

$$K = C + 273.15$$

Question 9

If you multiply 2.5 cm by 1.10 cm, how many significant figures should your answer have?

Accepted Answer

2

Question 10

Which of the following is an intensive property?

Accepted Answer

Density

Question 11

Mercury has a density of $$13.6 \ \frac{g}{cm^3$}. $$What is the mass in grams for 95 mL of mercury?

Accepted Answer

1292 g

Question 12

The density of copper decreases as temperature increases. What happens to a sample of copper when it is warmed?

Accepted Answer

The sample expands.

Question 13

Which of the following is the correct definition of density?

Accepted Answer

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

Question 14

Which type of energy is chemical energy?

Accepted Answer

Potential energy

Question 15

The burning of natural gas in a stove is:

Accepted Answer

Exothermic; negative sign

Question 16

Which equation is used to convert Fahrenheit temperature to Celsius?

Accepted Answer

$$C = \frac{5}{9}(F - 32)$$

Question 17

A 747 is fueled with 173,231 L of jet fuel. If the density of the fuel is $$0.768 \ \frac{g}{cm^3$}$$, what is the mass of the fuel in kilograms?

Accepted Answer

133,000 kg

Question 18

Which of the following is the correct conceptual plan for converting 1.76 yards to centimeters?

Accepted Answer

yd $$\rightarrow m$$ $$\rightarrow cm$$

Question 19

Which of the following statements about the First Law of Thermodynamics is correct?

Accepted Answer

Energy of the universe is conserved.

Question 20

A vineyard has 145 acres of grapes. If a soil supplement requires 5.50 g for every square meter, how many kilograms are needed for the entire vineyard? (1 acre = 4046.86 m$$^2)$$

Accepted Answer

3,220 kg

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