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Chemistry
GCSE

Explain why pure metals can be bent and shaped, whereas alloys cannot?

In pure metals the atoms are all the same size , hence the layers of atoms can slider over each other. However, in an alloy the different size atoms distory the layers in the structure hence it is difficu...

Answered by Ekaahh S. Chemistry tutor
11722 Views

The composition by mass of a compound is: C=36.4%, H=6% and F=57.6%. Calculate the empirical formula. If the RFM is 66, what is the molecular formula?

Calculate the moles of each of the 3 elements (to get C=3.03, H=6, F=3.03). Divide these by the smallest mol calculated to get the ratio of the elements. This will get C:H:F as 1:1.978:1 = 1:2:1 and so th...

Answered by Sara T. Chemistry tutor
5332 Views

Why do melting points decrease down group I?

As we go down group I, the ions have larger shells and the distance between the bonding electrons and positive nucleus decreases. This decreases the overall attraction forces between the two in metal latt...

Answered by Chloe W. Chemistry tutor
2999 Views

What elements make up the halides?

Flourine, chlorine, bromine, iodine, astatine

Answered by Will C. Chemistry tutor
1895 Views

What factors increase rate of reaction? (For a reaction between two reagents in solution)

For reaction in solution: Increasing concentration of either of the reagents: Greater concentration=more reagent particles in solution, so there are more collisions.Increasing Temperature: reagent particl...

Answered by Samuel P. Chemistry tutor
1742 Views

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