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Describe the bonding present in a piece of sodium metal.

A lattice of positive sodium ions with a sea of delocalised electrons distributed around them. The metallic bond consists of the electrostatic force of attracion between the positively charged sodium atoms a...
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Answered by Mark C. • Chemistry tutor
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11.25g of hydrated copper (II) sulfate is heated to constant mass. The new mass is found to be 7.19g. What is the formula of the hydrated copper (II) sulfate?

Hydrated Copper (II) sulfate The hydrated term means that this compound contains water of crystallisationWater of crystallisation means that there are chemically bonded water molecules withing the compound t...
UM
Answered by Una M. • Chemistry tutor
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Describe what the Activation Energy for a reaction is.

The activation energy is the minimum amount of energy that particles need to collide with for the reaction to occur.
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Answered by Adi R. • Chemistry tutor
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Can you describe ionic bonding and structure of ionic compounds to me?

Ionic bonding involves ionic bonds forming between a metal and a non- metal (show where metals and non- metals lie on the periodic table) and electrons are transferred. The structure of this ionic compound i...
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Answered by Deevani J. • Chemistry tutor
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Describe and explain how changes in the earth atmosphere, from the Precambrian Era (where the earth as occupied by volcanoes), have changed to form the surface of the Earth today and its atmosphere.

The Earth's atmospheric oxygen increased because plants and algae developed and used carbon dioxide for photosynthesis. This led to a decrease in atmospheric carbon dioxide levels. The origins of the oceans ...
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Answered by Simran D. • Chemistry tutor
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