
Counting Atoms
Quiz by Kelly Stephens
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Match the formula to the correct number of OXYGEN ATOMS:
Order these formulas from the smallest number of TOTAL atoms first to the largest number of atoms last.
How many TOTAL OXYGEN ATOMS are in this chemical equation?
2 Al(OH)3Â +Â 3 H2SO4Â -->Â 1 Al2(SO4)3Â +Â 6 H2O
How many TOTAL OXYGEN ATOMS are in this chemical equation?
1 CH4Â +Â 2 O2Â -->Â 1 CO2Â +Â 2 H2O
Place these compounds into the correct group:
What is the big number in front of a compound called?
What is the small number behind an element called?
Type your answer with no spaces and no commas (ex: 1111)
What are ALL of the coefficients for this chemical equation once it is correctly balanced?
8 COÂ +Â _____ H2Â -->Â 1 C8H18Â +Â 8 H2O
Type your answer with no spaces and no commas (ex: 1111)
What are ALL of the coefficients for this chemical equation once it is correctly balanced?
1 CH4Â +Â _____ O2Â -->Â 1 CO2Â +Â 2 H2O
Type your answer with no spaces and no commas (ex: 1111)
What are ALL of the coefficients for this chemical equation once it is correctly balanced?
2 Na + 1 Cl2 --> _____ NaCl
Type your answer with no spaces and no commas (ex: 1111)
What are ALL of the coefficients for this chemical equation once it is correctly balanced?
4 Al + 3 O2 --> _____ Al2O3
Type your answer with no spaces and no commas (ex: 1111)
What are ALL of the coefficients for this chemical equation once it is correctly balanced?
_____ N2Â +Â 3 H2Â -->Â _____ NH3
What is the MISSING coefficient?
1 Ca3(PO4)2Â +Â 2 H2SO4Â -->Â _____ CaSO4Â +Â 1 Ca(H2PO4)2
What is the MISSING coefficient?
1 Fe2O3 + 2 CO --> _____ Fe + 2 CO2
What is the MISSING coefficient?
2 H2SO4Â +Â 1 Pb(OH)4Â -->Â 1 Pb(SO4)2Â +Â _____ H2O
What are the MISSING coefficients? (ex:11)
2 Al + _____ HCl --> 2 AlCl3 + _____ H2
What are the MISSING coefficients? (ex 11)
_____ H3PO4 + _____ HCl --> 1 PCl5 + 4 H2O
What are the MISSING coefficients? (ex 11)
_____ S8Â +Â 12 O2Â -->Â _____ SO3
What are the MISSING coefficients? (ex 11)
_____ PÂ +Â _____ O2Â -->Â 2 P2O5
What are the MISSING coefficients? (ex 11)
_____ Ag2O + --> 4 Ag + _____ O2