CAN SOMEONE PLEASE HELP ME WITH THIS CHEMISTRY QUESTION PLEASE???!!!?
2017-02-01 11:58 pm
18.02g of water is decomposed by electrolysis, 16.00g of oxygen and 2.02g of hydrogen are formed. According to the law of definite proportions, what masses, in grams, of (a) hydrogen (b)oxygen will be formed by the electrolysis of 775g of water?
回答 (2)
2017-02-02 1:35 am
✔ 最佳答案
(a)According to the law of definite proportions, the mass ratio of water to hydrogen is constant.
(18.02 g) : (2.02 g) = (775 g) : (x g)
x = 775 × 2.02 / 18.02
x = 86.9
The mass of hydrogen formed = 86.9 g
(b)
According to the law of definite proportions, the mass ratio of water to oxygen is constant.
(18.02 g) : (16.00 g) = (775 g) : (y g)
y = 775 × 16.00 / 18.02
y = 688.1
The mass of oxygen formed = 688. 1 g
2017-02-02 1:28 am
775/18.02= 43.0077...
Mass(H) = 43.0077 ... x 2 = 86.0155... g
Mass(O) = 43.0077... x 16 = 688.124...g
Mass(H) = 43.0077 ... x 2 = 86.0155... g
Mass(O) = 43.0077... x 16 = 688.124...g
收錄日期: 2021-04-18 15:59:50
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