Search our library of homework questions

Top answers

All subjects

All levels

What reaction occurs when benzene is mixed with equal amounts of sulphuric and nitric acid?

Intro:This is an electrophilic substitution reaction (nitration)Nitric acid and sulphuric acid are used to create the electrophile (NO₂⁺)The electrophile then substitutes itse...

Answered by Simone S. • Chemistry tutor

2107 Views

Can we prove the existence of God?

The question of proving God's existence is central to debates surrounding a key area of the Theology syllabus - Philosophy of Religion in particular. To ‘prove’ that something exists would normally entail...

Answered by William L. • Religious Studies tutor

1777 Views

How does the human body's respiratory system enable the rapid exchange of gases between oxygen and CO2?

The blood capillaries surrounding the alveoli of the lungs provide them with a rich supply of flowing blood. This means that the oxygen depleted blood returning from the body picks up oxygen from inside t...

Answered by Shaakirah S. • Biology tutor

2705 Views

How should I structure my essays?

I always prioritise having a really bulletproof, strong structure - especially in the time constraints of a exam. I like to come up with my subtitles before I start writing, both to make sure I cover all ...

Answered by Stephen C. • History tutor

2248 Views

What is the difference between voltage and current?

The voltage (or potential difference) between two points is the cost in energy to move a unit of positive charge from the point of lower potential to the point of higher potentia...

Answered by Daniel W. • Physics tutor

3163 Views