(a) NO2
(b) CuO
sharon kalunda answered the question on March 29, 2019 at 06:26
- 0.92g of ethanol were found to burn in excess air producing a temperature rise of 32.5oC in 200cm3 of water(C=12.0,H=1.0,O=16.0) Density of water is 1g/cm3,...(Solved)
0.92g of ethanol were found to burn in excess air producing a temperature rise of 32.5oC in 200cm3 of water(C=12.0,H=1.0,O=16.0) Density of water is 1g/cm3, specific heat capacity of water is 4.2KjKg-1K-1.
(a) Write the equation for the combustion of ethanol.
(b) Determine the molar heat of combustion of ethanol
Date posted: March 29, 2019. Answers (1)
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Date posted: March 29, 2019. Answers (1)
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Date posted: March 29, 2019. Answers (1)
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a) Name substance M.
b) Name the process taking place in step II.
c)...(Solved)
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a) Name substance M.
b) Name the process taking place in step II.
c) Write an equation for the reaction in step III.
d) What is the fate of ammonium chloride in the solvay process.
Date posted: March 29, 2019. Answers (1)
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Date posted: March 29, 2019. Answers (1)
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a) State and explain the observation made when a mixture at equilibrium is heated.
b) If pressure is exerted at the mixture at equilibrium, what observation will be made?
Date posted: March 29, 2019. Answers (1)
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Date posted: March 29, 2019. Answers (1)
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Date posted: March 29, 2019. Answers (1)
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Date posted: March 29, 2019. Answers (1)
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Date posted: March 28, 2019. Answers (1)
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Date posted: March 28, 2019. Answers (1)
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In an experiment, two pieces of iron sheets were wrapped in each case with zinc and copper metal sheets as shown below.They were left in the open for some months.
State and explain the observations made in the experiments; (I), (II)
Date posted: March 28, 2019. Answers (1)
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Date posted: March 28, 2019. Answers (1)
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a) When anhydrous calcium chloride is left in an open beaker overnight a solution was formed.
b) When sodium carbonate decahydrate crystals...(Solved)
Name the following processes;
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b) When sodium carbonate decahydrate crystals are left in an open beaker for some days it turned into a powder.
Date posted: March 28, 2019. Answers (1)
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Date posted: March 28, 2019. Answers (1)
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Date posted: March 28, 2019. Answers (1)
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60cm³ of oxygen gas diffused through a porous hole in 50 seconds. How long will it take 80cm³ of sulphur (IV) oxide to diffuse through the same hole under the same conditions (S = 32, O = 16).
Date posted: March 28, 2019. Answers (1)
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Date posted: March 28, 2019. Answers (1)
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The formulae below belong to 2 cleansing agents.
(a) Which of the two cleaning agents would lather readily with hard water?
(b) State one disadvantage of the continued use of cleansing agent II.
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Date posted: March 28, 2019. Answers (1)
- When one mole of hydrocarbon M was completely burned in air, four moles of carbon (IV) oxide and three moles of water vapour were formed.
a)...(Solved)
When one mole of hydrocarbon M was completely burned in air, four moles of carbon (IV) oxide and three moles of water vapour were formed.
a) Work out the formula of the hydrocarbon.
b) Draw and name two structural formula of hydrocarbon M.
Date posted: March 28, 2019. Answers (1)