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Chemistry HESI A2 Practice Test

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HESI A2
Chemistry
Chemistry HESI A2 Practice Test

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Question 1 of 33

Carbon-12 and carbon-14 are isotopes. What do they have in common?

A. Number of nuclear particles

B. Number of protons

C. Number of neutrons

D. Mass number

Correct Answer:

Rationale:

Question 2 of 33

How many times more acidic is a substance with a pH of 3 compared to a substance with a pH of 5?

A. 8

B. 2

C. 100

D. 1,000

Correct Answer:

Rationale:

Question 3 of 33

Radioactive isotopes are frequently used in medicine. What kind of half-life would a medical isotope probably have?

A. Seconds-long

B. Days-long

C. Years-long

D. Many years long

Correct Answer:

Rationale:

Question 4 of 33

When an acid is added to a base, water and a salt form. What kinds of bonds form in these two compounds?

A. Liquid and metallic

B. Polar and nonpolar covalent

C. Polar covalent and ionic

D. Ionic only

Correct Answer:

Rationale:

Question 5 of 33

Al(NO3)3 + H2SO4 â†’ Al2(SO4)3 + HNO3 is an example of which kind of reaction?

A. Decomposition reaction

B. Synthesis reaction

C. Single replacement reaction

D. Double replacement reaction

Correct Answer:

Rationale:

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Chemistry HESI A2 Practice Test

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Question 1 of 33

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