Question 1

A chemist wants to make 5 L of a solution of NaCl that has a molarity of 0.5. How many moles of NaCl do they need?

Accepted Answer

A) 1)25 moles 
B) 5)0 moles 
C) 2)5 moles 
D) 25 moles 
A) 1)25 moles 
B) 5)0 moles 
C) 2)5 moles 
D) 25 moles

Question 2

What is the percent concentration of benzene in a solution containing 59 mL of benzene and 150 mL toluene?

Accepted Answer

A) 56.4 % 
B) 39.3 % 
C) 14.1 % 
D) 28.2 % 
A) 56.4 % 
B) 39.3 % 
C) 14.1 % 
D) 28.2 %

Question 3

Which of the following is a positively-charged atom?

Accepted Answer

A) Ion 
B) Anion 
C) Protons 
D) Cation 
A) Ion 
B) Anion 
C) Protons 
D) Cation

Question 4

Which of the following is emitted during beta decay?

Accepted Answer

A) Proton 
B) Electron 
C) Neutron 
D) Nucleus 
A) Proton 
B) Electron 
C) Neutron 
D) Nucleus

Question 5

Which of the following describes an ion?

Accepted Answer

A) A radioactive atom 
B) An atom with a full octet of valence electrons 
C) A charged atom 
D) A neutral atom 
A) A radioactive atom 
B) An atom with a full octet of valence electrons 
C) A charged atom 
D) A neutral atom

Question 6

Which of the following best describes a cation?

Accepted Answer

A) An atom that has more protons than electrons 
B) An atom that has more electrons than protons 
C) An atom with a negative charge 
D) An atom that has more neutrons than protons 
A) An atom that has more protons than electrons 
B) An atom that has more electrons than protons 
C) An atom with a negative charge 
D) An atom that has more neutrons than protons

Question 7

Which of the following shows a synthesis reaction?

Accepted Answer

A) AB + DC → AD + BC 
B) AB → A + B 
C) AB → A+ + B- 
D) A + B → AB 
A) AB + DC → AD + BC 
B) AB → A + B 
C) AB → A+ + B- 
D) A + B → AB

Question 8

Which of the following states of matter for a certain substance is generally the densest?

Accepted Answer

A) All are equally dense. 
B) Solid 
C) Liquid 
D) Gas 
A) All are equally dense. 
B) Solid 
C) Liquid 
D) Gas

Question 9

If a fat has more than one double bond, what is it called?

Accepted Answer

A) Polyunsaturated 
B) Trans fat 
C) Saturated 
D) Monounsaturated 
A) Polyunsaturated 
B) Trans fat 
C) Saturated 
D) Monounsaturated

Question 10

Elements in the modern periodic table are arranged by increasing what?

Accepted Answer

A) Number of electrons 
B) Atomic number 
C) Atomic mass 
D) Atomic radius 
A) Number of electrons 
B) Atomic number 
C) Atomic mass 
D) Atomic radius

Question 11

How many electrons does a neutral atom of nitrogen have?

Accepted Answer

A) 6 
B) 8 
C) 5 
D) 7 
A) 6 
B) 8 
C) 5 
D) 7

Question 12

Which of the following elements is located in period 2 of the periodic table?

Accepted Answer

A) Oxygen 
B) Helium 
C) Hydrogen 
D) Magnesium 
A) Oxygen 
B) Helium 
C) Hydrogen 
D) Magnesium

Question 13

Which of the following is not likely to have a dipole?

Accepted Answer

A) Salt 
B) Polar compound 
C) Ionic compound 
D) Nonpolar compound 
A) Salt 
B) Polar compound 
C) Ionic compound 
D) Nonpolar compound

Question 14

Which of the following comprise an ionic compound?

Accepted Answer

A) Electron and quark 
B) Cation and anion 
C) Cation and proton 
D) Anion and neutron 
A) Electron and quark 
B) Cation and anion 
C) Cation and proton 
D) Anion and neutron

Question 15

What does a double arrow mean in a chemical reaction?

Accepted Answer

A) The reaction proceeds to completion 
B) The reaction does not proceed 
C) The reaction is reversible 
D) A combustion reaction has occurred 
A) The reaction proceeds to completion 
B) The reaction does not proceed 
C) The reaction is reversible 
D) A combustion reaction has occurred

Question 16

Which of the following is a property of bases?

Accepted Answer

A) They taste sour 
B) They change red litmus paper to blue 
C) They have pka values below 7. 
D) They corrode metals 
A) They taste sour 
B) They change red litmus paper to blue 
C) They have pka values below 7. 
D) They corrode metals

Question 17

What is 85oC in degrees Fahrenheit.

Accepted Answer

A) 155 °F 
B) 54 °F 
C) 185 °F 
D) 23 °F 
A) 155 °F 
B) 54 °F 
C) 185 °F 
D) 23 °F

Question 18

Which of the following occurs during a redox reaction?

Accepted Answer

A) All chemicals are oxidized 
B) All chemicals are reduced 
C) The number of electrons in a reaction increases 
D) One species is reduced, while another is oxidized 
A) All chemicals are oxidized 
B) All chemicals are reduced 
C) The number of electrons in a reaction increases 
D) One species is reduced, while another is oxidized

Question 19

What are the units of molarity?

Accepted Answer

A) g/mL 
B) kg/L 
C) g/L 
D) mol/L 
A) g/mL 
B) kg/L 
C) g/L 
D) mol/L

Question 20

Which of the following states of matter take the shape of the container they are placed in?

Accepted Answer

A) Liquid and gas 
B) Gas and solid 
C) Liquid and solid 
D) Gas, liquid, and solid 
A) Liquid and gas 
B) Gas and solid 
C) Liquid and solid 
D) Gas, liquid, and solid

A chemist wants to make 5 L of a solution of NaCl that has a molarity of 0.5. How many moles of NaCl do they need?

What is the percent concentration of benzene in a solution containing 59 mL of benzene and 150 mL toluene?

Which of the following is a positively-charged atom?

Which of the following is emitted during beta decay?

Which of the following describes an ion?

Which of the following best describes a cation?

Which of the following shows a synthesis reaction?

Which of the following states of matter for a certain substance is generally the densest?

If a fat has more than one double bond, what is it called?

Elements in the modern periodic table are arranged by increasing what?

How many electrons does a neutral atom of nitrogen have?

Which of the following elements is located in period 2 of the periodic table?

Which of the following is not likely to have a dipole?

Which of the following comprise an ionic compound?

What does a double arrow mean in a chemical reaction?

Which of the following is a property of bases?

What is 85^oC in degrees Fahrenheit.

Which of the following occurs during a redox reaction?

What are the units of molarity?

Which of the following states of matter take the shape of the container they are placed in?

HESI-A2-Math

HESI-A2-Vocabulary

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HESI-A2-Grammar

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HESI-A2-Anatomy & Physiology

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Exam 1: HESI-A2-Chemistry

A chemist wants to make 5 L of a solution of NaCl that has a molarity of 0.5. How many moles of NaCl do they need?

What is the percent concentration of benzene in a solution containing 59 mL of benzene and 150 mL toluene?

Which of the following is a positively-charged atom?

Which of the following is emitted during beta decay?

Which of the following describes an ion?

Which of the following best describes a cation?

Which of the following shows a synthesis reaction?

Which of the following states of matter for a certain substance is generally the densest?

If a fat has more than one double bond, what is it called?

Elements in the modern periodic table are arranged by increasing what?

How many electrons does a neutral atom of nitrogen have?

Which of the following elements is located in period 2 of the periodic table?

Which of the following is not likely to have a dipole?

Which of the following comprise an ionic compound?

What does a double arrow mean in a chemical reaction?

Which of the following is a property of bases?

What is 85oC in degrees Fahrenheit.

Which of the following occurs during a redox reaction?

What are the units of molarity?

Which of the following states of matter take the shape of the container they are placed in?

HESI-A2-Math

HESI-A2-Vocabulary

HESI-A2-Reading

HESI-A2-Grammar

HESI-A2-Biology

HESI-A2-Physics

HESI-A2-Anatomy & Physiology

Filters

What is 85^oC in degrees Fahrenheit.