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Explain the differences between the 'passé composé' and the 'imparfait', and the circumstances in which each tense would normally be used.

In French, the 'passé composé' is used to describe actions which have already been completed in the past (which have finished). These include events which have only occurred one

JS
Answered by Jake S. French tutor
2198 Views

Explain, with reference to the electronic transitions involved, how characteristic flame colours of metal ions are formed and why the flame colours are different.


To answer this we need to talk about how electrons move in an atom. Electrons are in energy levels (orbitals) and an electron in the highest unoccupied orbital can be excited to a higher shell when ...

IK
Answered by Isabel K. Chemistry tutor
5072 Views

2x + y = 10 and 4y - 5x = 1, solve for x and y.

Rearrange one of the linear equations in order to have x or y written as an equation of the other. I.E 1) y =10 - 2x.Then substitute this value into the other equation: 4(10 - 2x) - 5x = 1, hence 39 = 13x...

NT
Answered by Nathan T. Maths tutor
4536 Views

Solve the equation 3^(2x+1)=1000

We can use logarithms with base 3 to solve this equation.2x+1=log310002x=log3(1000)-1x=0.5(log3(1000)-1)x=2.64

SD
Answered by Samuel D. Maths tutor
5214 Views

The shape around the oxygen atom in butan-2-ol is non linear. Predict the shape and angle of the C-O-H bond giving explanations

This bond can be described as having a non-linear or bent geometry, with a bond angle of approximately 104.5 degrees. It has this angle because the oxygen atom has 2 lone pairs and 2 bonding pairs of elec...

SD
Answered by Samuel D. Chemistry tutor
25109 Views

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