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Chemistry
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How is crude oil separated into fractions?

Crude oil is seperated using a method called fractional distillation. The hydrocarbons that make up crude oil have different boiling points, so when the crude oil is heated, each compound evaporates at...

Answered by Devna P. Chemistry tutor
11223 Views

Why does the bromine become polarised in HBr during electrophilic addition

A C to C double bond has a high electron density. As the bromine gets close to the C=C bond the high electron density repels the electrons in the H-Br bond further towards the H making the H slightly n...

Answered by Richard C. Chemistry tutor
5866 Views

What does Avogadro's number mean?

Avogadro's number is simply used as a way of telling us how much of a substance we have. 

The number is 6.022 x 1023, and if we have that number of particles, we can make it ea...

Answered by Kristina F. Chemistry tutor
24879 Views

"Sulfur Dioxide can be represented as a sulfur atom with double bonds to each of two oxygen atoms, explain the shape of this molecule and predict the bond angle".

This molecule is v-shaped. There are three areas of electron density surrounding the central sulfur atom, these three areas of electron density repel as far apart as possible, explained by the VSEPR th...

Answered by Firat G. Chemistry tutor
5560 Views

Cu2+ (aq) reacts with ammonia to form the complex ion [Cu(NH)3)4]2+. Explain this reaction in terms of acid-base theory, and outline the bonding in the complex formed between Cu2+ and NH3

Ammonia acts as the Lewis base in this reaction by donating its lone pair of electrons, whilst Cu2+ (which is an electron deficient, electrophile) accepts the lone pair of electrons from the ammonia, maki...

Answered by Sophie Z. Chemistry tutor
73762 Views

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