12,000 Joules of energy are needed to heat up a certain mass of water by 10. °C. (specific heat of water is
4.18 J/gºC)
What is the mass?

The answer to your question would be c. mineral oil  

The answer would be true

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.