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Chemistry
GCSE

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 atom...

MC
Answered by Mark C. Chemistry tutor
13951 Views

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) sulfateThe hydrated term means that this compound contains water of crystallisationWater of crystallisation means that there are chemically bonded water molecules wit...

UM
Answered by Una M. Chemistry tutor
6963 Views

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.

AR
Answered by Adi R. Chemistry tutor
1922 Views

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 compoun...

DJ
Answered by Deevani J. Chemistry tutor
3972 Views

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 ocea...

SD
Answered by Simran D. Chemistry tutor
4533 Views

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