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What is the difference between the verbs 'ser' and 'estar'

'Ser' and 'estar' refer to the verb 'to be'. However, in Spanish the verb 'to be' can be used in different ways depending on the context. For example 'estar' refers to a an emotional state that can vary w...

Answered by Patricia G. • Spanish tutor

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Periodicity shows a fairly smooth increasing trend across a period for ionisation energy. However, between groups 2 & 3 and groups 5 & 6, the trend doesn't appear to be followed. Using your knowledge of chemistry, explain why the trend isn't followed here

For elements in group 2, their valence electrons consist of "ns²" where n is the principle quantum number/shell number. However, for elements in group 3, their valence electrons consi...

Answered by George W. • Chemistry tutor

1624 Views

Solve the equations x-y=1 and 5x-3y=13

These equations are what we call 'simultaneous' which means they are solved together. To do this, we need to make one of the variables (x or y) the subject of either of the equations.Rearranging the first...

Answered by Christopher K. • Maths tutor

4070 Views

Draw the full structual diagram of ethyl-ethanoate, labeling relevent bond angles and explain why the molecule has this structure.

(unable to draw diagram and upload in this format) ethyl ethanoate has the semi structural formula of CH3COOCH2CH3. According to electron repulsion theory the bond angle around the second carbon atom woul...

Answered by • Chemistry tutor

5910 Views

What is Iambic Pentameter in Shakespeare's work?

Iambic Pentameter is a meter which Shakespeare frequently uses in his poetry and plays.Let's break the term down:An 'Iamb' is an unstressed syllable followed by a stressed syllable ('daDUM.')'Penta...

Answered by Phoebe F. • English Literature tutor

8651 Views