NEW
Font size
WorksheetsMole Concept part 3
Total questions: 10
Worksheet time: 15mins
A formula with the lowest whole number ratio of elements in a compound is called …
Chemical formula
Structural formula
Molecular formula
Empirical formula
A chemical formula that shows the actual number of atoms present in one molecule of a compound is called …
Chemical formula
Structural formula
Molecular formula
Empirical formula
Which of the following is an empirical formula?
P4O10
N2O
C2H4
H2O2
All of the following are empirical formulae EXCEPT
C3H8
Na2SO4
N2O4
Al3(SO4)2
Which of the following is the correct empirical formula for C4H10?
C2H5
C4H10
CH2.5
C8H20
A substance has a molecular formula of C8H10N4O2. The empirical formula is …
C2H6N2O
CHNO
C4H5N2O
C9H7N3O
A compound is 25.9% nitrogen and 74.1% oxygen. Find its empirical formula.
N2O4
N2O5
NO
N4O6
Determine the empirical formula for a compound with 87.1% Ag and 12.9% S.
Ag3S5
AgS2
Ag4S2
Ag2S
Epinephrine (adrenaline) is a hormone secreted into the bloodstream in times of stress. It contains 59.0% C, 7.15% H, 26.20% O and 7.65% N and has a molar mass of 183 g mol-1. What is its molecular formula?
C5H11N3O2
C8H12NO2
C7H9N2O
C9H13NO3
Molarity of a solution can be defined as …
atomic mass of an element
moles of solution per litre of solute
moles of solute per litre of solution
mass of solvent per litre of solution
