Q: Which of the following is NOT a correct conversion factor?

$$1\ \text{cm} = 10\ \text{mm}$$

Question 1

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

Accepted Answer

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

Question 2

A patient’s body temperature is measured at 102.2 °F. What is this temperature in degrees Celsius? Use the formula $$	ext{°C} = (	ext{°F} - 32)/1.8.$$

Accepted Answer

$$39.0\ 	ext{°C}$$

Question 3

Which of the following is the correct SI unit for measuring volume?

Accepted Answer

Cubic meter ($$	ext{m}^3)$$

Question 4

A sample of gold has a mass of $$38.6\ 	ext{g}$$ and a volume of $$2.00\ 	ext{cm}^3. $$What is the density of gold in $$	ext{g/cm}^3$$?

Accepted Answer

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

Question 5

Which of the following numbers has three significant figures?

Accepted Answer

0.00760

Question 6

A nurse needs to convert a patient’s weight from pounds to kilograms. If the patient weighs $$154\ 	ext{lb}$$, what is the weight in kilograms? ($$1\ 	ext{lb} = 0.454\ 	ext{kg})$$

Accepted Answer

$$69.9\ 	ext{kg}$$

Question 7

Which of the following best describes the concept of specific heat?

Accepted Answer

The amount of heat required to raise the temperature of 1 gram of a substance by 1 °C.

Question 8

A 250.0 g sample of water is heated from $$20.0\ 	ext{°C} to$$ $$50.0\ 	ext{°C}. $$How many calories of heat are required? (Specific heat of water = $$1.00\ 	ext{cal/g} \cdot 	ext{°C})$$

Accepted Answer

$$7,500\ 	ext{cal}$$

Question 9

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

Accepted Answer

$$K = 	ext{°C} + 273.15$$

Question 10

A solution has a density of $$1.10\ 	ext{g/mL}. $$What is its specific gravity at room temperature?

Accepted Answer

1.10

Question 11

A physician orders 500 mL of a saline solution. If the density of the solution is $$1.02\ 	ext{g/mL}$$, what is the mass of the solution in grams?

Accepted Answer

$$510\ 	ext{g}$$

Question 12

Which of the following is NOT a correct conversion factor?

Accepted Answer

$$1\ 	ext{cm} = 10\ 	ext{mm}$$

Question 13

A student records a measurement as $$0.00450\ 	ext{g}. $$How many significant figures does this value have?

Accepted Answer

3

Question 14

A nurse needs to administer 0.75 lb of medication. What is this mass in grams? ($$1\ 	ext{lb} = 454\ 	ext{g})$$

Accepted Answer

$$341\ 	ext{g}$$

Question 15

Which of the following best explains why ice floats on water?

Accepted Answer

Ice has a lower density than liquid water.

Question 16

A laboratory technician needs 25.0 g of isopropyl alcohol (density = $$0.7855\ 	ext{g/mL}). $$What volume should be measured out?

Accepted Answer

$$31.8\ 	ext{mL}$$

Question 17

A sample of iron (specific heat = $$0.106\ 	ext{cal/g} \cdot 	ext{°C}) $$absorbs $$53.0\ 	ext{cal} of $$heat, causing its temperature to increase by $$10.0\ 	ext{°C}. $$What is the mass of the iron sample?

Accepted Answer

$$50.0\ 	ext{g}$$

Question 18

Which of the following best describes the factor-label method (dimensional analysis)?

Accepted Answer

A problem-solving method that uses conversion factors to cancel unwanted units and obtain the desired units.

Question 19

A beaker contains 150.0 mL of ethanol (density = $$0.789\ 	ext{g/mL}). $$What is the mass of ethanol in the beaker?

Accepted Answer

$$118\ 	ext{g}$$

Question 20

A patient’s urine sample has a specific gravity of 1.025. What does this indicate about the sample?

Accepted Answer

The urine is slightly denser than water.

Matter and Measurements: Fundamentals of General, Organic, and Biological Chemistry

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