HESI A2 CHEMISTRY EXAM QUESTIONS

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HESI A2 CHEMISTRY EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -100 Questions and Answers -format set of multiple-choice -Expert- Explanation

Question 1: The atomic number is

Answer:

the number of protons in the nucleus of the atom

Question 2: 273 K

Answer:

freezing point in Kelvin

Question 3: Electronegativity

Answer:

is the ability to attract electrons

Question 4: 373 K

Answer:

boiling point in Kelvin

Question 5: Double Replacement

Answer:

AB + CD ? AD + CB

Question 6: Heta and Energy can be measured in

Answer:

Joules or calories

Question 7: Radioactive isotopes can be used

Answer:

to scan & create picture of the body''s internal organs

Question 8: CH? + 2O? ?

Answer:

2H?O + CO?

Question 9: Decomposition

Answer:

CaCO? ? CaO + CO?

Question 10: 212 degrees (212 F) is

Answer:

the boiling point for water

Question 11: An example of a definite shape and a definite volume

Answer:

I? (s)

Question 12: 1

Answer:

1x10?=

Question 13: How many times stronger is an acid w/ a pH of 3 than an acid with a pH of 6?

Answer:

a pH of 3 is one thousand times stronger

Question 14: Single Replacement

Answer:

AB + C ? AC + B

Question 15: An example of a compound with No ionic character

Answer:

CO

Question 16: The atom is composed of 3 smaller subatomic particles

Answer:

protons, neutrons, electrons

Question 17: 100 degrees Celsius is

Answer:

the boiling point for H2O

Question 18: Elements

Answer:

substances that cannot be broken down chemically

Question 19: 1 kg=

Answer:

10³ grams (1,000 g)

Question 20: as you move from left to right in a period

Answer:

the ionization energy of the electron increases

Question 21: the root meaning of atom is

Answer:

indivisible

Question 22: Boyles Law

Answer:

pressure & volume are inversely proportional Question 23: As water is evapo from a solution, the concentration of the solute in the solution will

Answer:

increase

Question 24: Ideal Gas Equation

Answer:

Relates pressure, volume, & temperature to the number of moles of a gas present

Question 25: Blue litmus paper turns red when the pH of a solution is

Answer:

6

Question 26: Gay-Lussac's Law

Answer:

Pressure & temperature are directly proportional

Question 27: Mole

Answer:

is another name for Avogadro's number

Question 28: When K bonds with I, the

Answer:

potassium loses one electron to iodine