Chemistry, 23.07.2019 16:30 maxi12312345
How many grams of nh4cl (mm = 53.49 g/mol) must be added to 0.250 l of 0.375 m nh3to produce a buffer solution with ph = 9.45? (kb of nh3 is 1.8 * 10−5)?
Answers: 1
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The kw for water at 0 °c is 0.12× 10–14 m2. calculate the ph of a neutral aqueous solution at 0 °c.
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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?
Answers: 1
How many grams of nh4cl (mm = 53.49 g/mol) must be added to 0.250 l of 0.375 m nh3to produce a buffe...
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