Chapter 10+11

Question 1

1 mole of carbon-12 atoms weighs exactly what amount?

Answer 1

12g

Question 2

Is a mole a standard international (SI) unit?

Answer 2

yes

Question 3

What is the expression that represents a mole of representative particles?

Answer 3

6.02 x 10^23

Question 4

What is Avogadro’s number?

Answer 4

602 sextillion particles (1 mole)

Question 5

What is the equation to change a number of moles into a number of particles?

Answer 5

(# of moles) x [(6.02 x 10^23) / (1 mole)] = Number of representative particles

Question 6

What is the equation to change a number of particles into a number of moles?

Answer 6

(# of particles) x [(1 mole) / (6.02 x 10^23)] = Number of moles

Question 7

What is the equation to convert moles into mass?

Answer 7

(# of moles) x (molar mass) = mass

Question 8

What is the equation to convert mass into moles?

Answer 8

given mass * (1 mole / molar mass) = moles

Question 9

What is the atomic weight of an Oxygen atom?

Answer 9

16g

Question 10

What is the Empirical formula poem

Answer 10

% to mass
mass to mold
Divide by small
multiply till whole

Question 11

How would you write: MgNO3 * 6H2O

Answer 11

Magnesium Nitrate HexaHydrate

Question 12

What is Cl ‘s rounded weight?

Answer 12

35.5

Question 13

What is Cu ‘s rounded weight?

Answer 13

63.5

Question 14

1 mole is equal to how many liters?

Answer 14

22.4L

Question 15

What is the equation to get the mole ratio?

Answer 15

given * (coefficient of unknown / coefficient of given) = moles of unknown

Question 16

When do chemical reactions stop?

Answer 16

When one of the reactants have been used up

Question 17

What do the coefficients in a chemical equation indicate?

Answer 17

The relationship between moles of reactants and products

Question 18

What is the equation used on mole-mole stoichiometry equations?

Answer 18

given moles * (moles of wanted substance / moles of given substance)

Question 19

What is the equation used to change substances?

Answer 19

given moles * (moles of wanted substance / moles of given substance)

Question 20

What equation do you use in volume-volume stoichiometry equations?

Answer 20

Liters of given * (1 mole of given / 22.4L) * (moles of wanted substance / moles of unwanted substance) * (22.4L / 1 mole)

Question 21

What do you do first with the Stack Method?

Answer 21

write known(given) and unknown ABOVE each substance WITH UNIT

Question 22

What do you do second with the Stack Method?

Answer 22

Write the conversion factor BELOW each substance WITH UNIT

Question 23

What is the third step with Stack Method?

Answer 23

Divide the value above the first substance by the value below

Question 24

What is the fourth step with Stack Method?

Answer 24

Multiply the value below the wanted substance by the amount of moles (middle/given value)

Question 25

What are the steps for finding the Limiting Reactant?

Answer 25

1. Balance the chemical equation 2. Convert g’s of each reactant to g’s of one of the products (2-step) 3. Compare the g’s of product for each, whichever gives LEAST is the limiting reactant

Question 26

What are the steps for finding the excess reactant?

Answer 26

1. Begin with og amount of the limiting reactant 2. convert g’s of limiting reactant to g’s of the excess reactant 3. (og amount of excess reactant) - (amount of excess reactant used up [step #2])