How many moles of NO2 are needed to increase the temperature of a 333 gram block of iron from 22⁰C to 1300⁰C? (specific heat of iron is 0.49 J/g⁰C) 3NO2 + H2O --> 2HNO3 + NO ∆H = - 138 kJ /mol

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .

Modern weaponry has increased the number of deaths in wars and violent conflicts.

Which element would mostly likely have an electron affinity measuring closest to zero