Recent questions in Chemistry

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Hydrated Copper (II) Sulphate is heated in a boiling tube as shown.

asked Aug 6, 2021 in Chemistry Form 1 by anonymous

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Balance the following chemical equations

asked Aug 6, 2021 in Chemistry Form 2 by anonymous

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1 answer

Define the following terms as used in medicine: Drug

asked Aug 6, 2021 in Chemistry Form 1 by anonymous

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Under what conditions does the Bunsen burner produce the luminous flame?

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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A non-luminous flame is preferred for heating. Explain

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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The following diagram represents a non-luminous flame of the Bunsen burner

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Two elements M and N have atomic numbers 17 and 20 respectively. Write the formula of the compound formed when M and N react.

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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The table below shows the atomic numbers of four elements W,X,Y and Z

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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Elements X and Y have atomic numbers 11 and 17 respectively. Which one of the elements is a metal? Give a reason for your answer.

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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An element B consists of three isotopes of mass, 28, 29 and 30 and percentage abundances of 92.2, 4.7 and 3.1 respectively. Show that the relative atomic mass of element is 28.11

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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An element, A, has 30 protons and 35 neutrons. What is

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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Element X has two isotopes. Two thirds of 3316X and one-third 3016X. What is the relative mass of element X?

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

Give an industrial application of sublimation

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Name two other substances that behave as dry ice

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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Carbon (IV) sublimes at -78ºC. It is called dry ice

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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State two situations where redox reactions are applied in industry

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Observe the equation below

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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State two similarities between rusting and combustion

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Moist iron wool was inverted over water. The set up was left to stand for 2 days

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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The table below shows some properties and electronic arrangements of common ions of elements represented by letters P to X. Study the information in the table and answer the questions that follow

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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