What is the new molarity of 25mL of 14.5M solution if it is diluted to a volume of 150mL?

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.

What are the first three quantum numbers for the electrons located in subshell 2s?

What is the value of keq for the reaction expressed in scientific notation?