Recent questions without an upvoted answer

0 votes

1 answer

State why it is necessary to leave an air space in closed glass bottle of water when it is to be kept in a refrigerator.

asked Aug 18, 2021 in Physics Form 1 by anonymous

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1 answer

Figure 2 below shows a piece of wood fitted into a copper pipe and a piece of paper wrapped tightly around the junction.

asked Aug 18, 2021 in Physics Form 1 by anonymous

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1 answer

Hydrogen was passed over copper II oxide in a combustion tube.

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

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3 answers

State the Archimedes principle.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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1 answer

Briefly explain why rooms are at a lower level and ventilators at a higher level.

asked Aug 18, 2021 in Physics Form 1 by anonymous

0 votes

1 answer

A mercury barometer reads 760mmHg at sealevel and 700mmHg at the top of a mountain. If the density of mercury is 13,600kg/m3 and average density of air is 1.30kg/m3, calculate the height of the mountain.

asked Aug 18, 2021 in Physics Form 1 by anonymous

0 votes

1 answer

A compound W consist of 26.7%carbon, 2.2% hydrogen and the rest oxygen. It has a relative formula Mass of 90(C=12, H=1, O=16,)

asked Aug 18, 2021 in Chemistry Form 3 by anony mous

0 votes

1 answer

A solid weighs 32.5N on the surface of the moon. The force of gravity on the moon is 1.7Nkg-1. Determine the mass of the solid.

asked Aug 18, 2021 in Physics Form 1 by anonymous

0 votes

1 answer

The figure below shows the scale of a measuring instrument when measuring the thickness of an object.

asked Aug 18, 2021 in Physics Form 1 by anonymous

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1 answer

Explain the following observations

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

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1 answer

Draw a dot (.) and cross (X) diagram to show the bonding in the molecules of : (Atomic number of carbon is 6, Oxygen is 8 and hydrogen is 1)

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

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1 answer

The diagram below represents a luminous flame. disgram of luminous flame Mark and label on the diagram the hottest and coolest parts

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

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1 answer

A fixed mass of a gas has a volume of 200cm3 at a temperature of 47°C and 750mmHg. Calculate the volume the gas would occupy at 7°C and 750mmHg pressure.

asked Aug 18, 2021 in Chemistry Form 3 by anony mous

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1 answer

Element J belong to period 3 and group V.

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

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1 answer

A student prepared ammonia gas and wanted to make a solution in water. Complete the diagram to show how he made the solution.

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

0 votes

1 answer

Classify the changes below as physical or chemical changes.

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

0 votes

1 answer

The table below shows the atomic numbers of elements F G and H.

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

0 votes

1 answer

Name the two allotropes of sulphur.

asked Aug 18, 2021 in Chemistry Form 3 by anony mous

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1 answer

Distinguish between allotropes and isotopes.

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

0 votes

1 answer

Dyes W,X, Y and Z were analysed using P as the purest sample of the dye required by a chemist .the result obtained were as shown on the chromatogram below.

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

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