Chemistry, 20.10.2021 17:30 MileenaKitana
53. A piece of zinc reacts completely with hydrochloric
acid, HCl(aq), to produce an aqueous solution of
zinc chloride, ZnCl2(aq), and hydrogen gas.
a. Use the data shown below to determine the
enthalpy of reaction per mole of zinc.
AH; of HCl(aq) = -167.2 kJ/mol
AH; of ZnCl2(aq) = -488.2 kJ/mol
Zn(s) + 2HCl(aq) β ZnCl2(aq) + H2(g)
b. What mass of zinc must be used for 123 kJ of heat
to be given off?
=-
-
Answers: 2
Chemistry, 22.06.2019 23:00
In which region is the substance in both the solid phase and the liquid phase? 1 2. 3 4 mark this and return save and exit next
Answers: 2
Chemistry, 22.06.2019 23:30
How many grams of ammonia would be produced by the decomposition of 16.93 mlof hydrazine? (the density of hydrazine is 1.021g/ml)
Answers: 3
Chemistry, 23.06.2019 03:20
High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03Γ108 pa , what is its running pressure in torr?
Answers: 3
53. A piece of zinc reacts completely with hydrochloric
acid, HCl(aq), to produce an aqueous solut...
Mathematics, 07.02.2021 04:00
Mathematics, 07.02.2021 04:00
Social Studies, 07.02.2021 04:00
Chemistry, 07.02.2021 04:00
History, 07.02.2021 04:00
Mathematics, 07.02.2021 04:00
Business, 07.02.2021 04:00
English, 07.02.2021 04:00
Mathematics, 07.02.2021 04:00
Mathematics, 07.02.2021 04:00
Biology, 07.02.2021 04:00
Mathematics, 07.02.2021 04:00