STOICHIOMETRY

Question 1

no. of moles

Answer 1

mass/molar mass

Question 2

no. of moles (in gases)

Answer 2

volume of gas/22.7

Question 3

conc. of sol

Answer 3

moles of solute/volume of sol.

Question 4

molecular formula=

Answer 4

n*empiral formula
* n=molecular mass/empiral formula mass

Question 5

% composition of an element

Answer 5

((relative atomic mass of the element* number of atoms of that element)/total mass of compound)*100

Question 6

for emperical formula if after divison answer in decimal then what will u do?

Answer 6

• if 0.5, x2
• if 0.33 or 0.66, multiply 3
• if 0.25/0.75, multiply by 4

Question 7

limiting reactant

Answer 7

• find mol of both
• divide by stoichiometric coefficient
• lesser number is limiting