A chemist prepares a solution of potassium iodide (KI) by measuring out 33. umol of potassium iodide into a 100mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in umol/L of the chemist's potassium iodide solution. Round your answer to 2 significant digits.

The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants. thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction. ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch, are burned? b) how much energy is released when 22.4g of ch. areburned?