Which step in a scientific method entails gathering information to identify variables that might with the experiment? conclusion hypothesis observation problem

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.

In 2002, the rare earth elements mine in mountain pass, california was closed because

If i had 2 m naoh solution, what does the 2 m stand for? 2 molar, but 2 of a solute in 1