The following chemical equation is not balanced: c3h8 + o2 co2 + h2o when this chemical equation is correctly balanced, what is the coefficient of the carbon dioxide molecule?

C3H8 +5O2 -> 3CO2+4H2O

I’m really not sure what’s the answer. sorry

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.