What is the mass percent compostition of carbon in a .100g sample of a carbon hydrogen oxygen compound? the compound when combusted in oxygen provided .220 g co2 and .239 g water

Which material burns faster? metal aluminum

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

In which region is the substance in both the solid phase and the liquid phase? 1 2. 3 4 mark this and return save and exit next