$$2 \times 10^4$ = 20000$$ $$\mum$$

$$1 \text{ L} = 1000 \text{ mL}$$

$$1 \text{ km} = 100,000 \text{ cm}$$

Question 1

A patient weighs 180 lbs and needs a dose of local anesthetic at 4.5 mg/kg. What is the correct dose in milligrams (mg)? (1 kg = 2.2 lbs)

Accepted Answer

405 mg

Question 2

Which of the following best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve transferring electrons, while covalent bonds involve sharing electrons.

Question 3

What is the number of neutrons in an atom of Iron (Fe) with atomic number 26 and atomic mass 55.85?

Accepted Answer

$$55.85 - 26 = 29.85$$ neutrons

Question 4

Which of the following molecules would most likely dissolve in water?

Accepted Answer

Polar molecules

Question 5

If you have 2 cm, how many micrometers ($$\mum) is $$this?

Accepted Answer

$$2 	imes 10^4$ = 20000$$ $$\mum$$

Question 6

Which statement about acids and bases is correct?

Accepted Answer

Acids release hydrogen ions (H$$^+) $$and bases accept hydrogen ions or release hydroxide ions (OH$$^-).$$

Question 7

A solution has a pH of 2. What does this indicate about the solution?

Accepted Answer

It is acidic.

Question 8

Which of the following best explains why oil and water do not mix?

Accepted Answer

Oil is hydrophobic and contains nonpolar covalent bonds, while water is hydrophilic and contains polar covalent bonds.

Question 9

What is the conversion factor from liters (L) to milliliters (mL)?

Accepted Answer

$$1 	ext{ L} = 1000 	ext{ mL}$$

Question 10

Which element has 18 electrons in its neutral state?

Accepted Answer

Argon (Ar)

Question 11

What is the main function of a buffer in biological systems?

Accepted Answer

To maintain a stable pH by neutralizing added acids or bases.

Question 12

How many centimeters are in one kilometer?

Accepted Answer

$$1 	ext{ km} = 100,000 	ext{ cm}$$

Question 13

Which of the following is true about the atomic number of an element?

Accepted Answer

It equals the number of protons in the atom.

Question 14

A Bohr model of magnesium (Mg) would show how many electrons in its outermost shell?

Accepted Answer

2 electrons

Question 15

Which of the following best describes a polar covalent bond?

Accepted Answer

Electrons are shared unequally, resulting in partial charges.

Question 16

If you measure the mass of a penny as 3.1 g, what is this mass in milligrams (mg)?

Accepted Answer

$$3.1 	ext{ g} = 3100 	ext{ mg}$$

Question 17

Which of the following bodily fluids is considered neutral based on its normal pH range?

Accepted Answer

Blood (pH 7.35 to 7.45)

Question 18

What happens to the pH of plain water when a strong acid is added, compared to when the same acid is added to a buffer solution?

Accepted Answer

The pH of water changes drastically, while the buffer solution resists pH change.

Question 19

Which of the following is a correct example of scientific notation for the number 65,000,000?

Accepted Answer

$$6.5 	imes 10^6$

Lab 1: Measurements & Chemistry – Foundations for Biology

Study Guide - Practice Questions