Recent questions in Chemistry

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1 answer

Study the equation below and answer the questions that follow:

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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1 answer

Dry ammonia gas was passed over heated copper(II) oxide.

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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1 answer

Study the table below and use it to answer the questions that follow. (The letters do not represent the actual symbols of the elements). Element S P Q R T Atomic Number 5 20 3 18 5 Atomic mass 10 40 7 40 11 Select two letters that represent a pair of isotopes

asked Jul 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

Give one negative effect of continuous use of nitrogenous fertilizers

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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1 answer

Determine the percentage of nitrogen in ammonium nitrate fertilizer (N=14.0, H=1.0,0=16.0 )

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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1 answer

State two applications of using impurities to lower the melting point of substances.

asked Jul 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

Calculate the volume of carbon(IV)oxide in 9,000 m3 of air contained in a room.

asked Jul 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

Why is the percentage of carbon (IV) oxide in the atmosphere fairly constant?

asked Jul 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

The standard electrode potentials of a metal H and Iron are given below.

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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1 answer

The diagram below shows the energy changes that occur when sodium chloride dissolves in water. Study it and answer the questions that follow.

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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1 answer

Study the equation below and answer the questions that follow. C4H8 + Cl2 C4H8Cl2

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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1 answer

Draw structural formulae of two positional isomers with molecular formula C4H8

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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1 answer

Nitrogen (I)oxide gas can be prepared in the laboratory using a mixture of ammonium chloride solution and sodium nitrate solution.

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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1 answer

A mixture of two liquids A and B with densities of 2.34g/cm3 and 1.30g/cm3 respectively is to be separated .

asked Jul 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

Explain how a burette is suited to its function of accurate measurement of volume of liquids

asked Jul 2, 2021 in Chemistry Form 1 by Majay

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5 answers

What is the chemical formulae for hydrogen?

asked Jun 28, 2021 in Chemistry Form 1 by Delae

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1 answer

The figure below shows variation of number of outermost electrons (1) with atomic number of elements in the periodic table

asked Jun 22, 2021 in Chemistry Form 2 by anony mous

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1 answer

A soapless detergent has the formula

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

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1 answer

State one difference in the properties of potassium and sodium soaps.

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

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1 answer

Compound C was used to prepare a potassium soap.

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

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