Q: The daily recommended limit for sodium is 2,300 mg. How many nanograms (ng) is this?

2.3 \times $$10^{9}$$ \text{ ng}

Q: Which of the following is the correct conversion factor for 1 mile to kilometers?

1 \text{ mile} = 1.6093 \text{ km}

Q: Which of the following is the correct conversion for 1 amu to grams?

1.6605 \times $$10^{-24}$$ \text{ g}

Question 1

Which of the following correctly expresses 7.12 × $$10^{-6}$$ seconds using an appropriate metric prefix?

Accepted Answer

7.12 \mu	ext{s}

Question 2

The number 0.000539 written in scientific notation is:

Accepted Answer

5.39 	imes $$10^{-4}$$

Question 3

A piece of magnesium metal measures 5.30 cm × 3.25 cm × 1.00 cm and has a mass of 30.0 g. What is its density in g/mL?

Accepted Answer

1.74 	ext{ g/mL}

Question 4

What is the chemical symbol for an element with 54 electrons and a charge of +2?

Accepted Answer

ext{Ba}

Question 5

The daily recommended limit for sodium is 2,300 mg. How many nanograms (ng) is this?

Accepted Answer

2.3 	imes $$10^{9}$$ 	ext{ ng}

Question 6

Which of the following is the correct conversion factor for 1 mile to kilometers?

Accepted Answer

1 	ext{ mile} = 1.6093 	ext{ km}

Question 7

A child weighs 45.0 pounds. If the maximum safe level for cadmium in blood is 0.0450 \mu	ext{g/dL} and the child has 75.0 mL blood per kg body weight, what is the maximum safe content of cadmium in ng for this child? (1 lb = 453.6 g)

Accepted Answer

154 	ext{ ng}

Question 8

The fastest tennis serve is 151 miles per hour. What is this speed in meters per second? (1 mile = 1.609 km, 1 km = 1000 m, 1 hour = 3600 s)

Accepted Answer

67.5 	ext{ m/s}

Question 9

How many liters are in a cubic cubit if 1 cubit = 18.2 inches and 1 inch = 2.54 cm?

Accepted Answer

52.5 	ext{ L}

Question 10

Which of the following is the correct number of protons, neutrons, and electrons in $$^{23}	ext{Na}^+$$?

Accepted Answer

11 p, 12 n, 10 e

Question 11

An average person weighs 135 lbs and contains 0.008% selenium by mass. How much selenium is in this person? (1 lb = 453.6 g)

Accepted Answer

61 	ext{ g}

Question 12

Which metric prefix corresponds to $$10^{-9}$$?

Accepted Answer

ext{nano}

Question 13

If one atom of an element has a mass of $$4.480 	imes 10$$^{-23}$$ g, what is the element? (1 amu = 1.6605$$ 	imes $$10^{-24} g)$$

Accepted Answer

ext{Sodium}

Question 14

How many cubic centimeters are in a cubic cubit if 1 cubit = 18.2 inches and 1 inch = 2.54 cm?

Accepted Answer

5520 	ext{ cm}^3

Question 15

Which of the following is the correct number of protons, neutrons, and electrons in $$^{88}	ext{Sr}^{2+}$$?

Accepted Answer

38 p, 50 n, 36 e

Question 16

Which of the following is the correct scientific notation for 0.000000000001?

Accepted Answer

1 	imes $$10^{-12}$$

Question 17

Which of the following is the correct conversion for 1 amu to grams?

Accepted Answer

1.6605 	imes $$10^{-24}$$ 	ext{ g}

Question 18

A sample has a density of 2.70 g/mL and a mass of 13.5 g. What is its volume in mL?

Accepted Answer

5.00 	ext{ mL}

Question 19

Which of the following is the correct metric prefix for $$10^{-12}$$?

Accepted Answer

ext{pico}

Question 20

A tennis ball travels 11.89 meters to the net at 67.5 m/s. How many milliseconds does it take to reach the net?

Accepted Answer

0.176 	ext{ s}

General Chemistry Exam 1 Study Guidance: Units, Conversions, Atomic Structure, and Calculations

Guida di studio - Domande di pratica

Study guide - Flashcard