0.45g sample of mineral ore is analyzed for chromium and found to contain 0.560mg Cr 2 O 3 . Express the concentration of Cr 2 O 3 in the sample as: (a) Percent (%) (b) Parts per thousand (ppt) (c) Parts per million (ppm) (d) Parts per billion (ppb)

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.

Aforce of attraction/repulsion due to the spin of electrons what is this force?

Ill give brainiestif one neutron initiates a fission event that produces two neutrons in the products, how many new reactions can now be initiated? if each of the neutrons produced in the first fission event then initiates a fission event that produces one neutron in the products, how many new reactions can now be initiated by each neutron? how many neutrons in total were produced by the two fission events described?