Which reaction is balanced correctly? c + o2 → 2co2 ch4 + 4o2 → co2 + 2h2o c3h8 + 5o2 → 3co2 + 4h2o c6h12o6 + 3o2 → 6co2 + 6h2o

The reaction is balanced correctly

Explanation:

In a balanced reaction, number of all atoms should be same in both side of reaction.

For the reaction, -

Number of C atom in left hand side= Number of C atom in right hand side=3

Number of H atom in left hand side= Number of H atom in right hand side=8

Number of O atom in left hand side= Number of O atom in right hand side=10

So, is balanced reaction.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.