标况下,一升氮气中有m个氮原子,则阿伏加德罗常数为A(m/44.8)mol－1 B11.2m mol-1我怎么觉得是B

标况下,一升氮气中有m个氮原子,则阿伏加德罗常数为A(m/44.8)mol－1 B11.2m mol-1我怎么觉得是B
%B1%EA%BF%F6%CF%C2%A3%AC%D2%BB%C9%FD%B5%AA%C6%F8%D6%D0%D3%D0m%B8%F6%B5%AA%D4%AD%D7%D3%A3%AC%D4%F2%B0%A2%B7%FC%BC%D3%B5%C2%C2%DE%B3%A3%CA%FD%CE%AAA%28m%2F44%2E8%29mol%A3%AD1++B11%2E2m+mol%2D1%CE%D2%D4%F5%C3%B4%BE%F5%B5%C3%CA%C7B