Determine the change in internal energy ΔU (in kJ units) in a chemical system that absorbs 40.5 kJ of heat from the surroundings and performs 30.1 kJ work on the surroundings.

Can anyone (a-level) a student was analysing a carbonate compound, mco3, containing an unknown group 2 metal, m. the student carried out thermal decomposition on 0.730g of the carbonate and measured the volume of gas produced. mco3 (s) mo (s) + co2 (g) the student collected and measured 120cm3 of carbon dioxide. 1 mol of carbon dioxide occupies 24 000 cm3 under these conditions. calculate the molar mass of the group 2 carbonate and hence deduce the identity of the group 2 metal, m.

Adepositional also feature that forms where a stream enters a lake or an ocean is a

What are the coefficients that will balance the skeleton equation below? n2 + h2 → nh3