HESI A2 CHEMISTRY 3 EXAM QUESTIONS

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HESI A2 CHEMISTRY 3 EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -25 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: What is the mass of ethyl alcohol that will exactly fill a 200.0 mL container??

• 157.8 g

?

• 25.49 g

?

• 0.39 g

?

• None of the above

Answer:

Correct Answer:

• 157.8 g

Question 2: In combination reactions, what is always true?

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• Involve only one reactant.

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• Involve an element and a compound.

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• Form only one product.

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• Require oxygen gas.

Answer:

Correct Answer:

• Form only one product.

Question 3: What occurs to an atom with a negative charge?

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• Gained an electron

?

• Lost an electron

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• Gained a proton

?

• Lost a proton

Answer:

Correct Answer:

• Gained an electron

Question 4: The chemical equation Cr + Fe(NO?)? ? Fe + Cr(NO?)? is an example of which type of reaction??

• Single replacement

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• Decomposition

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• Double replacement

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• Combustion

Answer:

Correct Answer:

• Single replacement

Question 5: When propane is reacted in the presence of oxygen gas, the products of this

combustion reaction are:

?

A. C + H2

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B. CH2 + H2O

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C. CO2 + H2

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D. CO2 + H2O

Answer:

Correct Answer:

D. CO2 + H2O

Question 6: A flask that weighs 345.8 g is filled with 225 mL of carbon tetrachloride. The weight of the flask and carbon tetrachloride is found to be 703.55 g. From this information, calculate the density of carbon tetrachloride.?

• 1.59 g/mL

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• 2.76 g/mL

?

• 1.4 g/mL

?

• None are correct.

Answer:

Correct Answer:

• 1.59 g/mL

Question 7: In a double replacement reaction, which of the following occurs?

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• Energy in the form of heat or light is not always produced.

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• The reactants can involve a variety of elements.

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• A gas, solid precipitate, or compound forms in the exchange of ions.

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• All of the above.

Answer:

Correct Answer:

• A gas, solid precipitate, or compound forms in the exchange of ions.

Question 8: Which of the following are decomposition reactions?

1) CH4 (g) + O2 (g) ? CO2 (g) + H2O (l) 2) CaO (s) + CO2 (g) ? CaCO3 (s) 3) Mg (s) + O2 (g) ? MgO (s) 4) PbCO3 (s) ? PbO (s) + CO2 (g) ?

• 2 and 3

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• 2 and 3

?

• 4

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• All of them are decomposition reactions.

Answer:

Correct Answer:

• PbCO3 (s) ? PbO (s) + CO2 (g)

Question 9: Which type of bond involves atoms gaining or losing electrons?

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• Ionic

?

• Covalent

?

• Both

?

• Neither

Answer:

Correct Answer:

• Ionic

Question 10: What is the density of a block on your desk that acts as a paperweight? The block measures 3cm by 4cm by 6cm and has a mass of 184.32g.?

• 13.27 g/cm3

?

• 2.56 g/cm3

?

• 0.39 g/cm3

?

• None of the above.

Answer:

Correct Answer:

• 2.56 g/cm3