Hesi Chemisrty

Front 1

What characterizes a chemical reaction as combustion?

Back 1

Addition of O2

Front 2

What is th charge on potassium in the compound KCI?

Back 2

+1

Front 3

How many electrons does an oxygen ion have?

Back 3

10

Front 4

How many neutrons does an atom of carbon-14 contain?

Back 4

8

Front 5

What is the strongest type of chemical bond?

Back 5

Covalent Bond

Front 6

What is the mass of one mole of carbon Dioxide?

Back 6

44 g/mol

Front 7

How many molecules are present in 2 moles of O2?

Back 7

1.204 x 1024

Front 8

How many moles of CO2 will be produced from the reaction of 3 moles of acetylene with excess oxygen?
2C2H+5O---4CO2+2H2O

Back 8

6 moles

Front 9

What would be the oxidation state of the sulfur atom in sulfuric acid H2SO4?

Back 9

+6

Front 10

What is the correct electron configuration for neon?

Back 10

Is22s22p6

Front 11

What is the ground state electron configuration for zinc?

Back 11

1s22s22s63s23p64s23d10

Front 12

What is the correct name of MgSO4?

Back 12

Magnesium sulfate

Front 13

What is the correct formula for magnesium chloride?

Back 13

MgCl2

Front 14

Phenolphthalein changes from colorless to pink in basic solutions. At what pH value would the solution remain colorless?

Back 14

8.4

Front 15

Iodine and carbon dioxide undergo sublimation at room temperature and atmospheric pressure. What is the process?

Back 15

Changing from solid to a gas.

Front 16

A catalyst increases the rate of reaction by?

Back 16

Lowering the activation energy.

Front 17

Redox reactions are those that occur with a transfer of electrons. What would cause an increase in the oxidation number?

Back 17

Oxidation

Front 18

Chemical reactions in lilving systems proceed along catabolic pathways and there tends to be an increase in?

Back 18

Entropy

Front 19

Which outcome measure would most likely indicate that a sample of water contains acid?

Back 19

pH

Front 20

Three states of matter?

Back 20

Solid, Liquid and Gas

Front 21

What are the 2 types of mixtures?

Back 21

Homogeneous and Heterogenous

Front 22

What is a physical change?

Back 22

No change has been made to the chemical composition.

Front 23

What is an element?

Back 23

The simplest of substances and is represented by specific letter of combination of letters.

Front 24

Where can elements be found?

Back 24

Perodic Table - elements asre arranged according to their chemical properties on the table.

Front 25

What are compounds?

Back 25

They are combinations of elements in whole number ratios.

Front 26

What is a chemical reaction?

Back 26

It is the breaking of bonds and the reforming of new bonds to create new chemical compounds with different chemical properties.

Front 27

What does the atom consist of?

Back 27

protons, neutrons, and electrons.

Front 28

Protons have a negative or positve charge?

Back 28

Positive

Front 29

Nuetrons have what charge?

Back 29

No charge

Front 30

Electrons have what charge?

Back 30

Negative

Front 31

The nucleus contains what?

Back 31

Protons and Neutrons

Front 32

Where are electrons located?

Back 32

In orbitals surrounding the nucleus.

Front 33

What is radioactivity

Back 33

Describes the emission of particles from an unstable nucleus.

Front 34

What are the 2 types of chemical bonding?

Back 34

Ionic Bond - electrostatic attraction between 2 oppositely charged ions - metals and non-metals.
A single covalent bond is formed when 2 atoms share a pair of electorns.

Front 35

What is the strongest type of chemical bond?

Back 35

Covalent Bond

Front 36

What does Hydrogen Bonds involve?

Back 36

Fluorine, chlorine, oxygen and nitrogen.