Q: Which of the following is the correct dimensional analysis setup to convert $$115$$ minutes to years?

$$115 \ \mathrm{min} \times \frac{1 \ \mathrm{hr}}{60 \ \mathrm{min}} \times \frac{1 \ \mathrm{day}}{24 \ \mathrm{hr}} \times \frac{1 \ \mathrm{yr}}{365 \ \mathrm{days}}$$

Question 1

Which of the following values is correctly written in scientific notation?

Accepted Answer

$$1.25 	imes 10^4$

Question 2

Convert $$3.25 	imes 10^2$ to standard notation.

Accepted Answer

$$325$$

Question 3

Which of the following is an SI base unit for mass?

Accepted Answer

$$\mathrm{kg}$$

Question 4

A laboratory measurement is recorded as $$0.00340 m. $$How many significant figures does this value have?

Accepted Answer

3

Question 5

Which metric prefix represents $$10^{-6}$$?

Accepted Answer

micro-

Question 6

Convert $$12$$ minutes into seconds using SI units.

Accepted Answer

$$720 s$$

Question 7

A patient receives $$2.73$$ drops/second of medication for $$7$$ hours. If each drop has a mass of $$42 mg$$, what is the total mass of medication delivered in grams?

Accepted Answer

$$2,887.08 mg$$

Question 8

Which of the following is an exact number?

Accepted Answer

12 eggs in a dozen

Question 9

What is the correct number of significant figures in the result of $$17.3 	imes 1.5$$?

Accepted Answer

2

Question 10

A room has a volume of $$1.5 	imes 10^9$ cm^3$. What is the volume in m^3$?

Accepted Answer

$$1.5 m$^3$$

Question 11

If the density of an unknown metal is $$2.1 g/cm$^3$$, express its density in kg/m$$^3.$$

Accepted Answer

$$2,100 kg/m$^3$$

Question 12

A piece of unknown solid weighs $$0.45 kg. $$When placed in a beaker, the water level increases from $$200 mL to$$ $$265 mL. $$What is the density of the solid in g/cm$$^3$$?

Accepted Answer

$$6.92 g/cm$^3$$

Question 13

Which of the following is the correct dimensional analysis setup to convert $$115$$ minutes to years?

Accepted Answer

$$115 \ \mathrm{min} 	imes \frac{1 \ \mathrm{hr}}{60 \ \mathrm{min}} 	imes \frac{1 \ \mathrm{day}}{24 \ \mathrm{hr}} 	imes \frac{1 \ \mathrm{yr}}{365 \ \mathrm{days}}$$

Question 14

A pharmaceutical drug contains $$4.0\%$$ active ingredient by mass. If each pill weighs $$1.25 g$$, what mass of active ingredient is present in one bottle of $$120$$ pills?

Accepted Answer

$$6.0 g$

Question 15

Which of the following is the correct formula for density?

Accepted Answer

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

Question 16

A scientist measures the length of a pencil as $$8.00 cm. $$How many significant figures are in this measurement?

Accepted Answer

3

Question 17

Which of the following is the correct SI unit for temperature?

Accepted Answer

kelvin

Question 18

If a solution has a density of $$1.00 g/mL$$, what is its density in kg/L?

Accepted Answer

$$1.00 kg/L$$

Question 19

A lead level in blood exceeds $$0.08$$ ppm. If $$400,000 mL of $$blood is tested, how many grams of Pb would be found at this concentration?

Accepted Answer

$$0.032 g$$

Ch.2 Measurement and Problem Solving – Study Notes

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