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What do the arrows in mechanisms represent?

The arrows represent the movement of a lone pair of electrons. For example, if a mechanism involves an oxygen atom forming a bond with a proton (hydrogen ion), then the oxygen would ‘donate’ a lone pair to t...
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Answered by Tarek K. • Chemistry tutor
3499 Views

How does DNA replication work?

First, the DNA Helicase enzyme ‘unzips’ the two stranded DNA by breaking the hydrogen bonds present between the complimentary base pairs on the two opposing strands. Then this leaves two exposed strands, all...
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Answered by Tarek K. • Biology tutor
3354 Views

What is a cadence?

A cadence is made up of two chords which signal the end of a musical phrase. There are four different kinds:The Perfect Cadence is really recognisable because we hear it all the time! It is a chord V followe...
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Answered by Kate W. • Music tutor
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What is the difference between "ser" and "estar"

A general way of differentiating the two verbs is by using "ser" for permanent states and "estar" for more temporary ones. For example: "estoy aburrido" means "I'm bored&qu...
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Answered by Rachel D. • Spanish tutor
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A triangular prism has mass 900g, length 20cm and the triangle bases are equilateral and with side length 6cm. Find the density(g/cm^3) of the material the prism is made of.

Answer:Density is mass/volume .: mass must be identified and volume calculated.Volume of triangular prism is calculated as prism length area of triangle.As triangles are equilateral and of side length 6cm ar...
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Answered by Oliver W. • Maths tutor
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