C3 stiochiometry

Question 1

define molecular formula of a compound

Answer 1

• number and type of atoms
• in one molecule

Question 2

formula of hydroxide

Answer 2

Question 3

formula of carbonate

Answer 3

Question 4

formula of chlorate

Answer 4

Question 5

formula of nitrate

Answer 5

Question 6

formula of sulfate

Answer 6

Question 7

define relative atomic mass

Answer 7

• avg mass
• of the isotopes of an element
• compared to 1/12th of the mass of an atom of ^12 C

Question 8

symbol for relative atomic mass

Answer 8

Ar

Question 9

define relative molecular mass

Answer 9

• sum of relative atomic masses
• ionic compounds: relative formula mass

Question 10

symbol for relative molecular/formula mass

Answer 10

Mr

Question 11

unit for concentration

Answer 11

g/dm^3

Question 12

define the mole

Answer 12

• unit of amount of substance
• one mole contains 6.02*10^23 particles (number known as the Avogadro constant)

Question 13

how to calculate amount of substance from mass and molar mass

Answer 13

moles = mass / molar mass

Question 14

units for molar mass

Answer 14

g/mol

Question 15

how to calculate mass from amount of substance and molar mass

Answer 15

mass = molar mass * amount of substance

Question 16

how to calculate molar mass from amount of substance and mass

Answer 16

molar mass = mass / amount of substance

Question 17

how to convert between cm^3 and dm^3

Answer 17

1dm^3 = 1000cm^3

Question 18

what is the molar gas volume at rtp

Answer 18

24dm^3

Question 19

what happens at anode during electrolysis

Answer 19

• anions attracted
• lose electrons
• become atoms