知到答案Basic Chemistry 基础化学智慧树答案_2022年

第六章

When the following equation is balanced, the coefficients are __________. NH3 (g) + O2 (g) → NO2 (g) + H2O (g)
1, 3, 1, 2
4, 3, 4, 3
4, 7, 4, 6
1, 1, 1, 1
答案:4, 7, 4, 6
When the following equation is balanced, the coefficient of Al is __________. Al (s) + H2O (l) → Al(OH)3 (s) + H2 (g)
4
1
5
2When the following equation is balanced, the coefficient of O2 is __________. C2H4O (g) + O2 (g) → CO2 (g) + H2O (g)
3
5
2
4Write the balanced equation for the reaction that occurs when methanol, CH3CH (l) is burned in air. What is the coefficient of methanol in the balanced equation?
1
2
3
1.5The balanced equation for the decomposition of sodium azide is __________.The solubility of manganese (II) hydroxide (Mn(OH)2) is 2.2 × 10-5 M. What is the Ksp of Mn(OH)2?What is the empirical formula of a compound that contains 49.4 % K, 20.3 % S, and 30.3 % O by mass?A compound contains 40.0 % C, 6.71 % H, and 53.29 % O by mass. The molecular weight of the compound is 60.05 amu. The molecular formula of this compound is __________.Magnesium and nitrogen react in a combination reaction to produce magnesium nitride: 3 Mg + N2 → Mg3N2 In a particular experiment, a 9.27 g sample of N2 reacts completely. The mass of Mg consumed is __________ g.
13.9
8.04
0.92
16.1Which of the following reactions is a redox reaction? (a) K2CrO4 + BaCl2 → BaCrO4 + 2KCl (b) Pb22+ + 2Br- → PbBr (c) Cu + S → CuS
(b) only
(b) and (c)
(c) only
(a) and (c)