Gịnị bụ ajụjụ a: "Calcium nitrate, nke a na-akpọkwa Norgessalpeter (Norwegian saltpeter), bụ ihe na-adịghị ahụkebe na usoro Ca ((NO3) 2"? Isiokwu a bụ Calcium nitrate.
"Gịnị bụ usoro maka calcium nitrate?"