21. Methane, CH4, the major component of natural gas, burns in air to form CO2 and H2O. What mass of water is formed in the complete combustion of 7.07 x 103 g of CH4?
(A) 2.55 x 103 g
(B) 7.94 x 103 g
(C) 2.38 x 104 g
(D) 1.59 x 104 g
(E) none of these

答案：登入後查看
統計： 尚無統計資料