General Chemistry: Gen Chem Basics (metrics, density, molecular formulas, balancing,etc)

Question 1

nano

Answer 1

10^-9

Question 2

micro

Answer 2

10^-6

Question 3

milli

Answer 3

10^-3

Question 4

centi

Answer 4

10^-2

Question 5

kilo

Answer 5

10^3

Question 6

mega

Answer 6

10^6

Question 7

conversion of L to m^3

Answer 7

1000 L = 1m^3

1L = 1000 cm^3

Question 8

Molarity (M)

Answer 8

Moles of solute / liter of solution (n/v)

Question 9

Angstrom (state units also)

Answer 9

10^-10m

Question 10

Order of magnitude

Answer 10

factor of 10

Question 11

Density (state units also)

Answer 11

mass per volume

p = mass/volume, kg/m^3 or g/cm^3

Question 12

How many kg/m^3 are in g/cm^3?

Answer 12

1000

Question 13

How many g/cm^3 are in kg/m^3?

Answer 13

10^-3

Question 14

Volume formula

Answer 14

m/p

Question 15

Molecular formula def

Answer 15

Number of each element in a molecule

Question 16

Define empirical formula

Answer 16

Smallest whole numbers that give the same ratio of atoms

Question 17

How to find empirical formula

Answer 17

Divide all subscripts of each element in the molecule by their greatest common factor - reduce

Question 18

Find the empirical formulas of the following formulas:

1) . C6H12O6
2) . K2S2O8
3) . Fe4-Na8-O35-P10
4) . C30-H27-N3-O15

Answer 18

1) . CH2O
2) . KSO4
3) . Fe4-Na8-O35-P10
4) . C10-H27-N3-O15

Question 19

List all the polyatomic ions

1. Ammonium
2. Hydronium
3. Acetate (AcO-)
4. Bicarbonate
5. Cyanide
6. Hydroxide
7. Nitrate
8. Nitrite
9. Perchlorate
10. Carbonate
11. Sulfate
12. Sulfite
13. Phosphate

Answer 19

1. NH3+
2. H30+
3. CH3CO2-
4. HCO3-
5. CN-
6. OH-
7. NO3-
8. NO2-
9. CLO-
10. CO3 2-
11. SO4 2-
12. SO3 2-
13. PO4 3-

Question 20

Formula weight

Answer 20

Sum of atomic weights in all atoms of a molecule (determined if you know chemical formula)

Question 21

amu

Answer 21

unit for atomic weight

Question 22

Mole

Answer 22

6.02 x 10^23

Question 23

Mole fraction - def

Answer 23

moles in substance / total # moles in solution

Question 24

When in mole fraction used

Answer 24

expressing concentrations when more than one solute is present, used when discussing mixture of gases