Identify the elements that have the following electron configurations: 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶ *

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 happens to energy in an open system?

0.66y = 0.9x + 0.48 if y has a value of 108.45 what is the value of x?