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Chemistry
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In fractional distillation the shorter hydrocarbons have lower boiling points and distil off first. Why?

Boiling points are determined by the interactions between the individual hydrocarbon molecules. The weaker the interactions, the ...

HB
Answered by Hannah B. Chemistry tutor
5772 Views

Why do acids have low pHs and alkaline solutions have high pHs?

The pH scale is a measure of how many H+ ions...

HB
Answered by Hannah B. Chemistry tutor
4006 Views

Work out the shape of an SF6 molecule

To work out the shape of the SF6 molecule we can use a simple equation which allows us to work out the number of electron pairs. The equation is (old group + electrons donated +/- charge) / 2. If the char...

MW
Answered by Maciej W. Chemistry tutor
3348 Views

State and explain the general trend in first ionization energy as you move across the period from left to right.

As you move across the period you are adding one more proton which increases the nuclear charge, you are also adding one more electron, however, the shielding provided by the extra electron is less than t...

MW
Answered by Maciej W. Chemistry tutor
2377 Views

Why is CO2 a linear molecule whereas H2O has a v-shaped geometry?

This is due to the different numbers of electrons in each molecule and VSEPR (Valence Shell Electron Repulsion) theory. This theory states that as electrons are negatively charged, the valence electrons i...

CW
90529 Views

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