balancing chemical equations

____CuCO₃ → ____CuO + ____CO₂

• 1,1,1

• 2,2,2

• 3,3,3

• 3,2,3

• 2,3,3

____Pb₃O₄ + ____HNO₃ → ____Pb(NO₃)₂ + ____PbO₂ + ____H₂O

• 4,3,2,1,1

• 1,4,2,1,2

• 3,1,2,3,4

• 4,3,2,1,1

• 2,8,4,2,4

Which side of the arrow are the products found?

• to the left

• to the right

• in the middle

Balance the Chemical Equation

__Na + __H₂O --> __NaOH + __H₂

• 2,2 --> 2,1

• 4,4 --> 4,1

• 1,2 --> 2,4

• 1,2 --> 2,1

Which side of the yield sign are the reactants found?

• to the left

• to the right

• in the middle

__Na + O₂ -----> __Na₂O

Balance it

• 2Na + O₂ ---> 4Na₂O

• 4Na + O₂ ---> 2Na₂O

• Na + O₂ ---> Na₂O

• 2Na + 2O₂ / 4Na₂O

Balance this equation: _Zn + _O2 --> _ZnO

• 1, 1, 2

• 2, 1, 2

• 1, 1, 1

• 2 ,2, 2

How many water molecules do you need to balance the equation: __H20 --> 2H2 + O2?

• 1

• 2

• 3

• 0

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

• H₃PO₄
• H₂SO₄
• HClO₃
• H₂O

How many aluminum atoms are in Al₂(SO₄)₃?

• 1
• 2
• 3
• 4