The symbol for the hydroxide ion is OH-
Because at atmospheric pressure the boiling point is below room temperature, just like Oxygen, Nitrogen etc
Answer:
The type of reaction for the following equation is combustion equation.
Explanation:
Combustion reaction is defined as the chemical reaction in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide gas and water molecule.

The reaction given to us:

When 1 mole of ethane reacts with 7/2 moles of oxygen gas it gives 3 moles of water and 2 moles of carbon dioxide gas.
The type of reaction for the following equation is combustion equation.
Answer: The weight of the object on earth =441N
Weight of the object on moon = 72N