Q: Which of the following is a correct conversion factor for converting $$1.228\ g/L to$$ $$kg/mL$$?

$$1.228 \times 10$$^{-6}$$\ kg/mL$$

Question 1

Which of the following best describes a chemical property?

Accepted Answer

Iron reacts with oxygen to form rust.

Question 2

A student measures the mass of a sample as $$0.00560\ kg. $$How many significant figures are in this measurement?

Accepted Answer

4

Question 3

Which of the following changes is a chemical change?

Accepted Answer

Silver tarnishing after exposure to air

Question 4

A pediatrician prescribes amoxicillin at a dose of $$75\ mg/kg$$ per day for a child weighing $$28\ lb. $$The medication is given twice daily and the liquid contains $$125\ mg/mL. $$How many milliliters should be given per dose? ($$1\ kg = 2.205\ lb)$$

Accepted Answer

$$3.8\ mL$$

Question 5

Convert $$21.1^\circ C to $$Kelvin.

Accepted Answer

$$294.1\ K$$

Question 6

Which of the following is the correct scientific notation for the number $$54095$$ with the correct number of significant figures?

Accepted Answer

$$5.4095 	imes 10^4$

Question 7

A piece of aluminum foil is $$22.8\ cm on $$each side and weighs $$2.56\ g. If $$the density of aluminum is $$2.70\ g/cm^3$, what is the thickness of the foil in millimeters?

Accepted Answer

$$0.018\ mm$$

Question 8

Which of the following is an example of an intensive property?

Accepted Answer

Density

Question 9

A tennis ball of mass $$58.0\ g is $$served at $$207.0\ km/h. $$What is its kinetic energy in joules? ($$KE = \frac{1}{2}mv^2$, 1$$\ km/h = 0.2778\ m/s$$)

Accepted Answer

$$1.02 	imes 10^2$\ J$$

Question 10

Which of the following statements about the law of conservation of mass is correct?

Accepted Answer

The total mass of reactants equals the total mass of products in a chemical reaction.

Question 11

A graduated cylinder contains $$19.9\ mL of $$water. After adding a piece of galena, the volume rises to $$24.5\ mL. $$What is the volume of the galena in liters?

Accepted Answer

$$4.6 	imes 10$$^{-3}$$\ L$$

Question 12

Which of the following is the correct conversion of $$5.70\ L to $$cubic inches? ($$1\ mL = 1\ cm^3$, 1$$\ inch = 2.54\ cm$$)

Accepted Answer

$$348\ in^3$

Question 13

Which of the following is a correct statement about SI base units?

Accepted Answer

The SI base unit for length is the meter (m).

Question 14

A chemist finds that $$30.5\ g of a $$liquid occupies $$38.6\ mL. $$Which substance is it most likely to be, given the following densities? N-butyl alcohol: $$0.810\ g/mL$$, Ethylene glycol: $$1.114\ g/mL$$, Isopropyl alcohol: $$0.785\ g/mL$$, Toluene: $$0.866\ g/mL.$$

Accepted Answer

Ethylene glycol

Question 15

Which of the following is the correct scientific notation for the speed of light, $$299,792,458\ m/s$$, to three significant figures?

Accepted Answer

$$3.00 	imes 10^8$\ m/s$$

Question 16

Which of the following is a correct conversion factor for converting $$1.228\ g/L to$$ $$kg/mL$$?

Accepted Answer

$$1.228 	imes 10$$^{-6}$$\ kg/mL$$

Question 17

Which of the following is a correct statement about accuracy and precision?

Accepted Answer

Precision refers to the reproducibility of measurements, while accuracy refers to closeness to the true value.

Question 18

Which of the following is the correct answer for $$6.3521 - 1.448$$ rounded to the correct number of significant figures?

Accepted Answer

$$4.90$$

Question 19

Which of the following is a correct example of a physical change?

Accepted Answer

Dissolving sugar in water

Units of Measurement, Physical and Chemical Change: General Chemistry Chapter 1 Study Notes

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