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What is the equilibrium constant for a reaction that has a value of Go = -41.8 kJ at 100oC?
Sulfuryl chloride is an inorganic compound with the formula SO2Cl2. It is a colourless liquid with a pungent odour. A quantity of 5.75 g of SO2Cl2 was placed in a 3.00 L flask. At 375 °C, there is 0.035 mole of Cl2 present. SO2Cl2(g) SO2(g) + Cl2(g) .calculate kc
Two applications of totaliternal reflection of light
If plum pudding model of atom would be valid, then producing cathode ray and electricity would be a myth”- justify these statement with scientific facts
Acetylsalicylic acid, HA is an active ingredient in aspirin, has Ka value of 3.0 x10-5 . In order to determine its chemical reactivity, 0.1 mole acetylsalicylic acid is dissolve in 1L of water.
a) Calculate the concentrations of all species in the acetylsalicylic acid solution [6 marks] b) Determine the pH of solution [1 mark]
c) If 100 mL of acetylsalicylic acid sample is titrated with 100 mL of 0.1 M NaOH, what is the pH of this mixture at equivalence point?
Calculate the value of E0 for each of the following reaction: Fe2+ (aq) + Ag+ ===> Fe3+(aq) + Ag (s)
1) What is the limiting reactant if 43.4 g of NH3 react with 30 g of NO? The balanced equation is 4NH3 + 6NO --> 5N2 + 6H2O.
2) If a reaction takes place and the theoretical yield is 73 g and the actual yield is 62 g, Calculate the percent yield.
3) How many grams of NO are formed if 8.3 g of ammonia react with 11.8 g of oxygen? The reaction is 4NH3 + 5O2 --> 4NO + 6H2O.
4) What is the percent yield if 0.856 g of NO is actually obtained in the lab during the following reaction: 4NH3 + 5O2 --> 4NO + 6H2O . 6.3 g of Ammonia was reacted with 1.8 g of Oxygen?
What current is required to produce 200 liter of hydrogen gas measured at S.T.P from electrolysis of water in 0.5 hours
What mass of calcium oxide is obtained from
the thermal decomposition of 50 g of calcium
carbonate, assuming a 40% yield ?
ii What mass of carbon dioxide will be given
off at the same time?
iii What volume will this gas occupy at rtp?
With strong heating, calcium carbonate undergoes
thermal decomposition:
CaCO3 (s) CaO (s) 1 CO2 ( g)
a Write a word equation for the change.
b How many moles of CaCO3 are in 50 g of calcium
carbonate? (Ar : Ca 5 40, C 5 12, O 5 16.)
c i What mass of calcium oxide is obtained from
the thermal decomposition of 50 g of calcium
carbonate, assuming a 40% yield ?
ii What mass of carbon dioxide will be given
off at the same time?
iii What volume will this gas occupy at rtp?
