Q: The density of silver is 10.5 $$g/cm^3. $$What is this density in $$kg/m^3$$?

$$1.05 \times 10$$^{4}$$ kg/m$$^{3}$

Question 1

Which of the following best explains why chemistry is considered the 'central science'?

Accepted Answer

Because it connects and overlaps with many other sciences such as biology, physics, geology, and medicine.

Question 2

A student measures the mass of an object three times and gets values of 9.98 g, 10.01 g, and 10.02 g. The true mass is 10.00 g. Which statement best describes the measurements?

Accepted Answer

The measurements are both accurate and precise.

Question 3

Which of the following numbers has exactly three significant figures?

Accepted Answer

0.0120

Question 4

What is the correct result (with proper significant figures) for the calculation $$5.02 	imes 89.665 	imes 0.10$$?

Accepted Answer

45

Question 5

Which of the following is an example of an exact number?

Accepted Answer

The number of students in a classroom.

Question 6

A block of iron measures 2.25 in. by 3.65 cm by 44.0 mm. The density of iron is 7.86 $$g/cm^3. $$What is the mass of the block in grams (to the correct number of significant figures)?

Accepted Answer

$$7.22 	imes 10$$^{2}$$ g

Question 7

Which of the following is the correct formula for converting Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 8

A person’s average daily intake of glucose is 0.0833 lbs. What is this mass in milligrams? (1 lb = 453.6 g)

Accepted Answer

$$3.78 	imes 10$$^{4}$$ mg

Question 9

Which of the following statements about significant figures is FALSE?

Accepted Answer

All zeros before the decimal point are significant.

Question 10

Convert 1.76 yards to centimeters using the correct number of significant figures. (1 m = 1.094 yd, 1 m = 100 cm)

Accepted Answer

161 cm

Question 11

Which of the following is the correct relationship between milliliters and cubic centimeters?

Accepted Answer

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

Question 12

The density of silver is 10.5 $$g/cm^3. $$What is this density in $$kg/m^3$$?

Accepted Answer

$$1.05 	imes 10$$^{4}$$ kg/m$$^{3}$

Question 13

Which of the following is NOT a base SI unit?

Accepted Answer

Liter (L)

Question 14

A temperature is measured as 41 \ ^\circ C in New Delhi and 103 \ ^\circ F in Phoenix. Which city is hotter?

Accepted Answer

New Delhi is hotter.

Question 15

Which of the following is the correct formula for the volume of a sphere?

Accepted Answer

$$V = \frac{4}{3}\pi r$$^{3}$$

Question 16

A graduated cylinder contains 16.5 mL of water. After dropping in an ice cube, the volume rises to 19.2 mL. If the density of ice is 0.9167 $$g/cm^3$$, what is the mass of the ice cube?

Accepted Answer

2.48 g

Question 17

Which of the following is the correct prefix for $$10^{-9}$$?

Accepted Answer

Nano

Question 18

Which of the following best describes the process of dimensional analysis?

Accepted Answer

Using conversion factors to change from one unit to another.

Question 19

Which of the following is the correct formula for converting Fahrenheit to Celsius?

Accepted Answer

$$^\circ C = \frac{(^\circ F - 32)}{1.8}$$

Question 20

Which of the following is NOT a property that depends on the quantity of substance present?

Accepted Answer

Density

Matter, Measurement, and Problem Solving: Foundations of General Chemistry

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