Determine the density of nh3 gas at 435k and 1.00atm

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.

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver

What mass of glucose is produced when 54g of water react with carbon dioxide