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- The diagram below represents set-up that can be used to prepare and collect oxygen gas(Solved)
The diagram below represents set-up that can be used to prepare and collect oxygen gas
a) Name solid P
b) What property of oxygen makes it possible for its collection as indicated by the
diagram.
c) Explain why it is important not to collect any gas for the first few seconds of the
experiment.
Date posted: May 13, 2019. Answers (1)
- Study the flow chart below and answer the questions that follow.(Solved)
Study the flow chart below and answer the questions that follow.
a) Identify N and P
b) What name is given to the type of halogenation/Chlorination reaction in step 2
Date posted: May 13, 2019. Answers (1)
- During the electrolysis of dilute sulphuric (VI) acid the volume of hydrogen gas collected is twice
the volume of oxygen gas. Using half equations justify the...(Solved)
During the electrolysis of dilute sulphuric (VI) acid the volume of hydrogen gas collected is twice
the volume of oxygen gas. Using half equations justify the above statement.
Date posted: May 13, 2019. Answers (1)
- Under certain conditions ,methane reacts with steam to form carbon (II) oxide and hydrogen only. Calculate the total volume of the gas that can be...(Solved)
Under certain conditions ,methane reacts with steam to form carbon (II) oxide and hydrogen only. Calculate the total volume of the gas that can be formed when 100cm3 of steam reacts completely with methane.
Calculate the enthalpy change of the reaction.
Date posted: May 13, 2019. Answers (1)
- Classify the following processes as either chemical or physical.(Solved)
Classify the following processes as either chemical or physical.
Date posted: May 13, 2019. Answers (1)
- The equation for dissolution of bismuth(III) chloride in water is(Solved)
The equation for dissolution of bismuth(III) chloride in water is
Explain the effect on the position of equilibrium if sodium hydroxide solution is added to the mixture at equilibrium.
Date posted: May 13, 2019. Answers (1)
- State the Lechateiler’s principle.(Solved)
State the Lechateiler’s principle.
Date posted: May 13, 2019. Answers (1)
- Carbon(IV) oxide is one of the main contributor to global warming.
Name two other gases.(Solved)
Carbon(IV) oxide is one of the main contributor to global warming.
Name two other gases.
Date posted: May 13, 2019. Answers (1)
- Using a suitable equation explain why it is not advisable to use hardwater in hot water
systems.(Solved)
Using a suitable equation explain why it is not advisable to use hardwater in hot water
systems.
Date posted: May 13, 2019. Answers (1)
- The catalytic oxidation of ammonia gas is done as per the set up below.(Solved)
The catalytic oxidation of ammonia gas is done as per the set up below.
a) Name the catalyst used in the above reaction.
b) After sometime, brown fumes are formed in the flask. Explain briefly how this
observation occurs.
c) Why does the metal catalyst stay red hot for some time?
Date posted: May 13, 2019. Answers (1)
- Below is a table of 1st ionization energies for elements A,B,C, and D which are metals.(Solved)
Below is a table of 1st ionization energies for elements A,B,C, and D which are metals.
a) What is meant by 1st ionization energy?
b) With an explanation, arrange the elements in order of increasing reactivities.
Date posted: May 13, 2019. Answers (1)
- Hydrogen gas is one of the lightest gas known but has not lived to its expectation to be used inObservation balloons. Explain(Solved)
Hydrogen gas is one of the lightest gas known but has not lived to its expectation to be used inObservation balloons. Explain
Date posted: May 13, 2019. Answers (1)
- Describe how you would prepare a sample of iron(II)carbonate,starting with iron metal and dilute hydrochloric acid.(Solved)
Describe how you would prepare a sample of iron(II)carbonate,starting with iron metal and dilute hydrochloric acid.
Date posted: May 13, 2019. Answers (1)
- When 1.15g of R were reacted with water, 600cm3 of gas was produced.
Determine the relative atomic mass of R. (Molar gas volume = 24 000...(Solved)
When 1.15g of R were reacted with water, 600cm3 of gas was produced.
Determine the relative atomic mass of R. (Molar gas volume = 24 000 cm3).
Date posted: May 7, 2019. Answers (1)
- Draw and name the isomers of pentane(Solved)
Draw and name the isomers of pentane
Date posted: May 7, 2019. Answers (1)
- 60 cm3 of oxygen gas diffused through a porous partition in 50
seconds. How long would it take 60cm3 of sulphur (IV) oxide gas to diffuse
through...(Solved)
60 cm3 of oxygen gas diffused through a porous partition in 50
seconds. How long would it take 60cm3 of sulphur (IV) oxide gas to diffuse
through the same partition under the same conditions? (S = 32.0, 0 = 16.0)
Date posted: May 7, 2019. Answers (1)
- When 8.53g of sodium nitrate were heated in an open test-tube, the
mass of oxygen gas produced was 0.83 g . Given the equation of the
reaction...(Solved)
When 8.53g of sodium nitrate were heated in an open test-tube, the
mass of oxygen gas produced was 0.83 g . Given the equation of the
reaction as 2NaNO 3 (s) -> 2NaNO 2 (s) + O 2 (g)
Calculate the percentage of sodium nitrate that was converted to sodium
nitrite. (Na = 23.0, N = 14.0, O = 16.0)
Date posted: May 7, 2019. Answers (1)
- A label on a bottle of hydrochloric acid has the following information: Density 1.134g/cm^3,percentage purity 37% .Determine the molarity of the solution(Solved)
A label on a bottle of hydrochloric acid has the following information: Density 1.134g/cm^3,percentage purity 37%. Determine the molarity of the solution
Date posted: May 1, 2019. Answers (1)
- Explain the Reaction of ammonia with oxygen.(Solved)
Explain the Reaction of ammonia with oxygen.
Date posted: April 30, 2019. Answers (1)
- Explain Ammonia as a reducing agent.(Solved)
Explain Ammonia as a reducing agent.
Date posted: April 30, 2019. Answers (1)