Can you balance these. Please

Number one) H3PO4 + NaOH --> H2O + Na3PO4

Number two) Ca(OH)2 + HNO3 --> Ca(NO3)2 + H2O

Number three) CaCO3 --> CaO + CO2

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1) H3PO4 + NaOH --> H2O + Na3PO4

Can be written as:

H3PO4 + 3 NaOH ---> 3 H2O + Na3PO4

2) Ca(OH)2 + HNO3 --> Ca(NO3)2 + H2O

Can be written as:

Ca(OH)2 + 2 HNO3 --> Ca(NO3)2 + 2 H2O

3) CaCO3 --> CaO + CO2

Can be written as:

CaCO3 --> CaO + CO2

H3PO4 + 3NaOH ---> 3H2O + Na3PO4

Ca(OH)2 + 2HNO3 ---> Ca(NO3)2 + 2H2O

CaCO3 ---> CaO + CO2 (Already balanced)

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