根据16×30=480,直接写出下面算式的结果。
160×30=____ 160×3=____ 16×300=____
Mr. Green is very happy because he is satisfied with his students' work today.
①同质量、不同密度的Cl2和CO ②同温度、同体积的H2和 N2
③同体积、同密度的 C2H4和C3H6两种气体 ④同压强、同体积的N2O 和 CO2两种气体.