Consider the 4 chemical reactions below. I. 2 H2O2(ℓ) → 2 H2O(ℓ) + O2(g)
II. N2(g) + 3 H2(g) → 2 NH3(g)
III. CaCO3(s) → CaO(s) + CO2(g)
IV. SO2(g) + H2O(ℓ) → H2SO3(aq)
For which reaction(s) will ∆S be negative?

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

Modern weaponry has increased the number of deaths in wars and violent conflicts.

Which other elements contain the same number of outer electrons as sodium