is H2O2(aq) -> H2O(l) + O2(g) reversible why or why not and what is aq, l and g mean please explain

Areaction in which products can react to re-form reactants is

What is the molecular formula of ferrous nitrate and ferric nitrate

4786 joules of heat are transferred to a 89.0 gramsample of an unknown material, with an initialtemperature of 23.0°c. what is the specific heat of thematerialif the final temperature is 89.5 °c?