Ch. 3

Question 1

What is the SI unit of length

Answer 1

meters (m)

Question 2

What is the SI unit of weight

Answer 2

Kilogram (kg)

Question 3

What is the SI unit of time

Answer 3

Seconds (s)

Question 4

What is the SI unit of the amount of a substance

Answer 4

mole (mol)

Question 5

What is the SI unit of temp

Answer 5

Kelvin (K)

Question 6

What is the SI unit of electric current

Answer 6

Ampere (A)

Question 7

What is the SI unit of speed

Answer 7

m/s

Question 8

What is the SI unit of energy

Answer 8

joule m^2/s^2 *Kg

Question 9

what is 1m^3 equal to in liters

Answer 9

1000L

Question 10

what is molarity

Answer 10

of moles divided by # of liters of solution

Question 11

what is nano

Answer 11

10^-9 (n)

Question 12

what is micro

Answer 12

10^-6 (µ)

Question 13

what is milli

Answer 13

10^-3 (m)

Question 14

what is centi

Answer 14

10^-2 (c)

Question 15

what is kilo

Answer 15

10^3 (k)

Question 16

what is mega

Answer 16

10^6 (M)

Question 17

what is density? what is the units? what is the conversion of both units?

Answer 17

density is mass over volume. the units are usually g/cm^3 or Kg/cm^3. you can convert between these two units by dividing by 1000 (kg to g) or multiplying by 1000 (g to kg)

Question 18

what is empirical formula

Answer 18

smallest ratio of atoms

Question 19

molar mass is what unit?

Answer 19

grams on molecular weight

Question 20

what are oxidative numbers/states

Answer 20

they are meant to indicate how the atoms “ownership” of its ve- change when it forms a compound

Question 21

what are the first three rules of oxidation states?

Answer 21

1. OS of any element by itself is 0
2. the sum of OS must be 0 if its not an ion
3. group one metals have +1 OS, group two metals have +2 OS

Question 22

what are the last four rules of oxidation states?

Answer 22

4. fluorine has -1 OS
5. H has +1 OS when bound to something more EN but has -1 OS with an atom less EN. 0 when bounded with oxygen
6. oxygen has -2 OS
7. halogens has -1 OS

Question 23

what is important to note when finding OS

Answer 23

the sum of OS must be equal to the number of atoms present in compound unless its an ion

Question 24

find OS of NO3- and HNO2

Answer 24

NO3- has 3 O=-6 and one N=5 making overall OS=-1
HNO2 has 1 H=+1 (because N is more EN) , 1 N=+3, and 2 O= -4

Question 25

what is an angstrom? what is an order of magnitude?

Answer 25

angstrom is ten to the -10th power. order of magnitude is a factor of ten.

Question 26

formula of ammonium? hydronium?

Answer 26

ammonium= NH4+
hydronium=H3O+

Question 27

formula of acetate? bicarbonate?

Answer 27

acetate= CH3CO2-
bicarbonate= HCO3-

Question 28

what is important to note about a limiting reagent

Answer 28

its the molecule that gets consumed first and its always a reactant

Question 29

formula of nitrate? nitrite?

Answer 29

nitrate= NO3-
nitrite=NO2-

Question 30

formula of Perchlorate? Cyanide?

Answer 30

Perchlorate= ClO4-
Cyanide= CN-

Question 31

formula for sulfate? sulfite?

Answer 31

sulfate= SO4^2-
Sulfite= SO3^2-

Question 32

formula for carbonate? phosphate?

Answer 32

carbonate= CO3^2-
phosphate= PO4^3-