Solid sodium reacts violently with water producing heat, hydrogen gas and sodium hydroxide. how many molecules of hydrogen gas are produced when 65.4g of sodium are added to water? 2na(s)+ 2h2o(l) --> . 2naoh(aq) + h2(g)

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.