25.0 cm of a solution of potassium hydroxide are neutralised by 35.0 cm of aqueous hydrochloric acid of concentration 0.75 mol/dm3. Calculate the concentration in mol/dm³ of the potassium hydroxide solution.

Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2(s) + 2h2o(l) → ca(oh)2(aq) + 2h2(g) how many grams of cah2 are needed to generate 45.0 l of h2 gas at a pressure of 0.995 atm and a temperature of 32 °c?

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

An experimental procedure requires a 10 ml of acid to be dissolved