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WorksheetsC1-3 Chemical formula
Total questions: 10
Worksheet time: 8mins
The formula of a molecule shows the numbers of atoms of each element present. For the formula of water, H2O, how many atoms of hydrogen are there?
ANSWER USING NUMBERS NOT WORDS!
(a)
The formula of a molecule shows the numbers of atoms of each element present. For the formula of ammonia, NH3, how many atoms of hydrogen are there? ANSWER USING NUMBERS NOT WORDS!
(a)
The formula of a molecule shows the numbers of atoms of each element present. For the formula of carbon dioxide, CO2, how many atoms are there in one molecule?
ANSWER USING NUMBERS NOT WORDS!
(a)
How many atoms of hydrogen are there in a butane molecule?
ANSWER IN NUMBERS NOT WORDS!
(a)
What one word describes these molecules, H2, N2, O2 and Cl2?
(a)
Which of these formula is NOT correct?
NaCl
KO2
CaCO3
CaBr2
Pentene is a hydrocarbon which contains twice the number of hydrogen atoms as there are carbon atoms. If there are 5 carbon atoms what is the formula of pentene?
C5H5
CH5
C5H10
C2H4
Which shows the correct formula of calcium nitrate?
CaNO3
Ca3NO
CaNO32
Ca(NO3)2
Methane, CH4 has how many atoms in total?
ANSWER IN NUMBERS NOT WORDS!
(a)
What would be a simpler way to write the formula of pentane, CH3(CH2)3CH3?
CH
C3H8
C5H10
CH3
