Q: Convert 54.8 gallons to milliliters. (1 gal = 3.7854 L, 1 L = 1000 mL)

$$2.07 \times 10^5$\ \mathrm{mL}$$

Question 1

A forensic analyst examines a lead bullet fragment recovered from a crime scene. The fragment has a mass of 32.4 g and displaces 2.86 mL of water. What is the density of the lead in g/cm$$^3$$?

Accepted Answer

$$11.3\ \mathrm{g/cm^3$}$$

Question 2

Which of the following statements about significant figures is correct?

Accepted Answer

Trailing zeros in a number with a decimal point are significant.

Question 3

Convert 54.8 gallons to milliliters. (1 gal = 3.7854 L, 1 L = 1000 mL)

Accepted Answer

$$2.07 	imes 10^5$\ \mathrm{mL}$$

Question 4

A patient is prescribed 0.30 grams of a medication. The medication is available in liquid form at a concentration of 75 mg / 5 mL. How many teaspoons should be administered? (1 gram = 1000 mg, 1 tsp = 5 mL)

Accepted Answer

$$2\ \mathrm{tsp}$$

Question 5

Which of the following is an intensive property?

Accepted Answer

Density

Question 6

If the weather outside is 29 $$^	ext{o}C$$, what is the temperature in Kelvin?

Accepted Answer

$$302.15\ \mathrm{K}$$

Question 7

A graduated cylinder contains 53.55 mL of water and rises to 67.95 mL when an object is placed into it. If the density of the object is 2.85 g/mL, what is the mass of the object?

Accepted Answer

$$41.9\ \mathrm{g}$$

Question 8

Which measurement system is based on powers of 10 for easy conversions?

Accepted Answer

Metric System

Question 9

Round 0.05878 to 3 significant figures.

Accepted Answer

$$0.0588$$

Question 10

Which of the following is the correct conversion factor to convert inches to centimeters?

Accepted Answer

$$\frac{2.54\ \mathrm{cm}}{1\ \mathrm{in.}}$$

Question 11

A mineral's mass is 5.50 oz. What is this measurement in kilograms? (1 oz = 28.35 g, 1000 g = 1 kg)

Accepted Answer

$$0.156\ \mathrm{kg}$$

Question 12

Which of the following numbers has 4 significant figures?

Accepted Answer

$$100.0$$

Question 13

Which statement best describes accuracy?

Accepted Answer

How close a measurement is to the accepted value.

Question 14

A student measures the length of an object four times: 0.480 mm, 0.495 mm, 0.555 mm, 0.400 mm. The actual length is 0.435 mm. Which statement is correct?

Accepted Answer

The results are neither precise nor accurate.

Question 15

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

Accepted Answer

$$T_F = 1.8(T_C) + 32$$

Question 16

Which of the following is NOT a step in dimensional analysis?

Accepted Answer

Estimate the uncertain digit.

Question 17

A 4.00-qt sample of antifreeze weighs 9.26 lb. What is the density of the antifreeze in g/mL? (1 lb = 453.59 g, 1 qt = 0.94635 L, 1 L = 1000 mL)

Accepted Answer

$$0.61\ \mathrm{g/mL}$$

Question 18

Which of the following is the metric base unit for mass?

Accepted Answer

Kilogram

Question 19

Which of the following is true about density and temperature?

Accepted Answer

Density always decreases with increasing temperature.

Measurement, Density, and Reliability in Scientific Problem Solving

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