Quiz 2/Exam 2

Question 1

Decomposition reaction

Answer 1

CD - - - - > C + D

Question 2

Combination reaction

Answer 2

A + B - - - - > AB

Question 3

Single-displacement reaction

Answer 3

A + CD - - - - > C + AD

Question 4

Double-displacement reaction

Answer 4

CD + EF - - - - > CF + ED

Question 5

Halogen displacement

Answer 5

One halogen can displace a halide

Question 6

Halogen

Answer 6

Diatomic

Question 7

Halide

Answer 7

Monoatomic

Question 8

Halogen activity series

Answer 8

F2 > Cl2 > Br2 > I2

Question 9

Three types of double-displacement reactions

Answer 9

Precipitation, acid-base, gas formation

Question 10

Precipitation reaction

Answer 10

Formation of an insoluble solid called a precipitate

Question 11

Combustion reactions

Answer 11

Any reaction involving oxygen as a reactant

Question 12

Molecular equation (ME)

Answer 12

In which substances are represented as they exist as molecules

Question 13

Ionic equations

Answer 13

Represents substances in their realistic forms in solution

Question 14

Strong electrolytes

Answer 14

Separate into ions

Question 15

Always

Answer 15

Ask if reaction happens or not

Question 16

Hydrocarbon combustion

Answer 16

Product is always gonna be CO + H2O

Question 17

Net ionic equation

Answer 17

Eliminate spectator ions, only if same charge, same number, and reaction is balanced. If everything can cancel out, no reaction happened

Question 18

Metals can

Answer 18

React with nonmetals to form an ionic compound

Question 19

Solids are

Answer 19

Insoluble

Question 20

Percent composition

Answer 20

Weight of element/weight of compound times 100%

Question 21

Empirical formula from percent

Answer 21

Turn percent into grams, convert the mass into moles (atomic weight/Mol), divide by lowest number and use in ratio

Question 22

Molecular formula from empirical formula

Answer 22

Weight of empirical formula/weight of sample, multiply with result

Question 23

Moles to grams

Answer 23

? mols of element x (? molar mass of element/1 mol of element)

Question 24

Grams to moles

Answer 24

? Grams of element x 1 mol of element/? Molar mass of element

Question 25

Atoms present in molecule

Answer 25

1 mol of compound x Avogadro’s number molecules of compound/1 mol of compound x number of atoms for one element in a compound/1 molecule of compound

Question 26

Molarity

Answer 26

Convert to moles, number of moles of solute/number of liters in solution = M

Question 27

Molarity and dilutions

Answer 27

Molarity 1 x Volume 1 = Molarity 2 x Volume 2

Question 28

Unstable products that dissolve into gases and water

Answer 28

H2CO3 and H2SO3

Question 29

Strong acids

Answer 29

HCl, HBr, HI, HNO3, H2SO4, HClO4

Question 30

What never splits

Answer 30

Solid, liquid, gas