Top answers

What is fractional distillation used for in industry? Explain the molecular basis behind it.

Separating different sized hydrocarbons (from crude oil)Different length hydrocarbons have different strength VDW forces between their moleculesTherefore longer length hydrocarbons have stronger VDW forces b...
NG
Answered by Nick G. • Chemistry tutor
2785 Views

Describe the chemical composition of phospholipids and how they form cell membranes? (10 marks)

Phospholipids are amphipathic molecules i.e. they have a hydrophilic (“water-loving”), polar head end, and a hydrophobic (“water-fearing”), nonpolar tail end (1 mark). The major phospholipids in most animal ...
AB
Answered by Akash B. • Biology tutor
7570 Views

Why is it "Ich wohne hier seit 4 Jahren" and not "Ich habe hier seit 4 Jahren gewohnt"?

The latter would seem to make sense, as it is a direct translation of the English " I have lived/have been living here for 4 years ", however, when describing the length of time that an action has ...
TB
Answered by Tatyana B. • German tutor
5928 Views

How does the writer use language to create a strong impact on the reader? Use examples.

The writer uses strong meaningful language; mainly adjectives to create a strong impact on the reader. 'Steinbeck' uses adjectives such as; 'dark, motionless, humid, quiet' to describe what the night was lik...
VV
17108 Views

What is the difference between a historian and a biographer?

Suetonius represents an example of an ancient biographer. While Suetonius was a Roman, the biographical tradition came from the Greeks and another example can also be found in Plutarch. Ancient biographies a...
MS
5330 Views