Question 1

A patient’s body temperature is measured as 102.2 $$^\circF. $$What is this temperature in Kelvin? (Use $$K = (\frac{5}{9})(^\circ F - 32) + 273.15)$$

Accepted Answer

$$312.0\ K$$

Question 2

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Salad dressing with oil and vinegar

Question 3

A gold bar has a mass of $$250.0\ g$$ and a volume of $$13.0\ cm^3$. What is its density?

Accepted Answer

$$19.2\ g/cm^3$

Question 4

Which of the following statements about Dalton’s Atomic Theory is NOT accepted in the modern view?

Accepted Answer

Atoms are indivisible and indestructible.

Question 5

Which of the following is a physical property?

Accepted Answer

Melting point

Question 6

How many significant figures are in the measurement $$0.004560\ m$$?

Accepted Answer

4

Question 7

Which element is a metalloid?

Accepted Answer

Silicon

Question 8

A food contains $$10\ g of $$protein, $$5\ g of $$fat, and $$20\ g of $$carbohydrates. If protein provides $$4\ kcal/g$$, fat $$9\ kcal/g$$, and carbohydrates $$4\ kcal/g$$, what is the total caloric content?

Accepted Answer

$$145\ kcal$$

Question 9

Which of the following is the correct abbreviated electron configuration for calcium ($$Z=20$$)?

Accepted Answer

$$[Ar]\ 4s^2$

Question 10

Which of the following best describes the difference between atomic mass and mass number?

Accepted Answer

Atomic mass is the weighted average of all isotopes; mass number is the total number of protons and neutrons in one atom.

Question 11

Which region of the electromagnetic spectrum has the highest energy?

Accepted Answer

Gamma rays

Question 12

How many protons, neutrons, and electrons are in $$^{37}_{17}Cl$$?

Accepted Answer

17 protons, 20 neutrons, 17 electrons

Question 13

A sample of ethanol has a density of $$0.789\ g/mL. $$What is the mass of $$250.0\ mL of $$ethanol?

Accepted Answer

$$197\ g$$

Question 14

Which of the following is an exact number?

Accepted Answer

There are 12 eggs in a dozen.

Question 15

Which of the following is a chemical change?

Accepted Answer

Burning wood

Question 16

How many valence electrons does phosphorus ($$Z=15) $$have?

Accepted Answer

5

Question 17

Convert $$3.45 	imes 10^4$ to standard notation.

Accepted Answer

34,500

Question 18

Which of the following is the correct order for filling orbitals according to the Aufbau principle?

Accepted Answer

$$1s \rightarrow 2s \rightarrow 2p \rightarrow 3s \rightarrow 3p \rightarrow 4s \rightarrow 3d$$

Question 19

A student needs to prepare $$250.0\ mL of a $$solution. How many liters is this?

Accepted Answer

$$0.250\ L$$

Question 20

Which of the following best describes the difference between kinetic and potential energy?

Accepted Answer

Kinetic energy is energy of motion; potential energy is stored energy.

Introductory Chemistry Study Guide: Measurements, Matter, Atomic Structure, and Electronic Structure

Guida di studio - Domande di pratica

Study guide - Flashcard