balance the equations

Question

1. ____C3H8(g) + ____O2(g) --------> ____CO2(g) + ____H2O(g)

2. ____Ca(s) + ____Ni(NO3)2(aq) --------> ____Ca(NO3)2(aq) + ____Ni(s)

3. ____Ba(OH)2(aq) + ____HNO3(aq) ---------> ____H2O(l) + ____Ba(NO3)2(aq)

Answer 1

1. ____C3H8(g) + ___5_O2(g) --------> __3__CO2(g) + ___4_H2O(g)

2. __1__Ca(s) + ___1_Ni(NO3)2(aq) --------> __1__Ca(NO3)2(aq) + __1__Ni(s)

3. ____Ba(OH)2(aq) + __2__HNO3(aq) ---------> __2__H2O(l) + ____Ba(NO3)2(aq)