F 84 J of heat is added to a pure gold coin with a mass of 10 g , what is the temperature change? The specific heat capacity of gold is 0.128 J/g∘C. PLS HELP

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

How are the terms group and period used on the periodic table

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?