Q: The speed of light is approximately $$3.00 \times 10^8$\ m/s. $$Convert this speed to $$yd/wk. ($$Use $$1\ yd = 0.914\ m$$, $$1\ wk = 604800\ s)$$

$$2.31 \times 10$$^{13}$$\ yd/wk$$

Question 1

A patient’s weight is measured as 154 lbs in a hospital. What is the mass of the patient in kilograms ($$kg$$)?

Accepted Answer

$$70.0\ kg$$

Question 2

Convert $$850\ ft to $$kilometers ($$km) $$using the provided conversion factors.

Accepted Answer

$$0.259\ km$$

Question 3

Which of the following is the correct sequence of steps for converting units?

Accepted Answer

Write given and target units, write conversion factors as fractions, cancel units, multiply and solve.

Question 4

A car travels at $$67.5\ mi/hr. $$What is its speed in $$m/s$$? (Use $$1\ mi = 1.609\ km$$, $$1\ km = 1000\ m$$, $$1\ hr = 3600\ s)$$

Accepted Answer

$$30.2\ m/s$$

Question 5

How many gallons are in $$1\ m^3$? (Use 1$$\ gal = 3.79\ L$$, 1$$\ $$m^3 = 1000$$\ L$$)

Accepted Answer

$$264\ gal$$

Question 6

Convert $$100\ ft^2$ to m^2$. (Use 1$$\ ft = 0.305\ m$$)

Accepted Answer

$$9.30\ m^2$

Question 7

A laboratory sample has a mass of $$3.5\ oz. $$What is the mass in grams ($$g$$)? (Use $$1\ oz = 28.4\ g)$$

Accepted Answer

$$99.4\ g$$

Question 8

The speed of light is approximately $$3.00 	imes 10^8$\ m/s. $$Convert this speed to $$yd/wk. ($$Use $$1\ yd = 0.914\ m$$, $$1\ wk = 604800\ s)$$

Accepted Answer

$$2.31 	imes 10$$^{13}$$\ yd/wk$$

Question 9

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

Accepted Answer

$$1\ in = 2.54\ cm$$

Question 10

A medicine dosage is prescribed as $$450\ mg. If $$the available tablets are $$1\ oz$$ each, how many tablets are needed to provide the correct dose? (Use $$1\ oz = 28.4\ g)$$

Accepted Answer

$$0.016\ tablets$$

Question 11

Which of the following best describes why it is important to convert all units to S.I. units before using equations in chemistry?

Accepted Answer

Equations are derived using S.I. units, so using other units can lead to incorrect results.

Question 12

A rectangular garden measures $$30\ ft by$$ $$20\ ft. $$What is the area in $$m^2$$? (Use $$1\ ft = 0.305\ m)$$

Accepted Answer

$$55.8\ m^2$

Question 13

A car’s fuel tank holds $$15\ gal. $$What is this volume in liters ($$L$$)? (Use $$1\ gal = 3.79\ L)$$

Accepted Answer

$$56.9\ L$$

Question 14

If a swimming pool contains $$25000\ L of $$water, how many quarts ($$qt) is $$this? (Use $$1\ L = 1.06\ qt)$$

Accepted Answer

$$26500\ qt$$

Question 15

A runner completes a $$10\ km$$ race. How many miles did they run? (Use $$1\ km = 0.621\ mi)$$

Accepted Answer

$$6.21\ mi$$

Question 16

Which of the following is the correct conversion for $$1\ mL$$?

Accepted Answer

$$1\ mL = 1\ cm^3$

Unit Conversions in General Chemistry Private -20th July

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