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Chemistry
GCSE

Describe how and explain why vegetable oils are hardened for use in foods.

Vegetable oils are reacted with hydrogen at 60 degrees Celcius in the presence of a nickel catalyst. This process is called hydrogenation. Vegetable oils contain carbon to carbon double bonds meaning they...

Answered by Rachel J. Chemistry tutor
14975 Views

How does hot water in lakes make fish die

Increase in temperature causes a decrease in soulubility of gases so loss of oxygen and therefore fish die due to a loss of oxygen 

Answered by Zehra M. Chemistry tutor
1756 Views

How do I balance the chemical equation: C2H4 + O2 --> CO2 +H2O

First take a look at the equation and see how many elements there are, in this case we have 3 different elements; Carbon, Hydrogen and Oxygen. To balance the equation start off by balancing the elements i...

Answered by Andrei P. Chemistry tutor
50525 Views

Whats the difference between an ionic bond and a covalent bond?

In an ionic bond, the bond is due to electrostatic attraction between the two ions. In a covalent bond the bond is formed due to the sharing of electrons between the bonding atoms.

Answered by Nehal Praveen S. Chemistry tutor
6236 Views

Why does Magnesium Oxide have a higher melting point than Sodium Chloride?

Both Magnesium Oxide and Sodium Chloride exist as a giant ionic lattices where each oppositely charged ion is held in place by a strong electrostatic attractions. These ionic bonds are strong and require ...

Answered by James C. Chemistry tutor
76875 Views

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