A. +571.6 kJ B. -571.6 kJ C. -285.8 kJ D. +285.8 kJ Correct Answer: Option C = -285.8 kJ
Na2CO3(g) + 2HCl(aq) → 2NaCl(aq) + H2O(l) + CO2(g) A. 1.000 mole B. 0.100 mole C. 0.010 mole` D. 0.111…
A. 4H+ + 4e− → 2H2 B. 4OH− + 4e− → 2H2O + O2 C. 2OH− + 2e− → 2OH…
A. SO3 B. S8 C. H2S D. SO2 Correct Answer: Option C = H2S
A. 0.5 mol dm−³ of hydrochloric acid B. 2.0 mol dm−³ of hydrochloric acid C. 0.5 mol dm−³ ethanoic acid…
A. Leclanche cell B. lead accumulator C. Daniel cell D. voltaic cell Correct Answer: Option A - Leclanche cell Explanation…
A. Au³+ B. Fe³+ C. ClO− D. Ca²+ Correct Answer: Option C = ClO− Explanation All the other options…
2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g) A. 264 g B. 39 g C. 352 g D. 156 g Correct…
A. 0.009 B. 0.093 C. 0.910 D. 1.090 Correct Answer: Option D = 1.090
A. Rutherford B. Thompson C. Bohr D. Dalton Correct Answer: Option A - Rutherford