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Predict the number of peaks in a carbon-13 NMR spectrum of the following carbonyl isomers of C5H8O. (i) CH3CH2CH2CH2CHO (ii) (CH3)3CCHO (iii) CH3COCH(CH3)2

(i) 5 peaks (ii) 3 peaks(iii) 4 peaks
ED
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given that y = 1 when x = π, find y in terms of x for the differential equation, dy/dx = xycos(x)

y -1 dy = xcos(x) dx∫y -1 dy = ∫xcos(x) dx ln(y) = ∫xcos(x) dx [using integration by parts to integrate the right hand side] therefore, ln(y) = xsin(x) - ∫sin(x) dxln(y) = xsin(x) + cos(x) + cat y = 1, x = π...
AS
Answered by Abhiparth S. • Maths tutor
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How do you ask in french ?

To form a question in french you have to change the order of the words. You have to put the verb before the subject and use a hyphen to join them together. For exemple : Do you speak french ? Parles-tu franç...
Answered by • French tutor
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In a science experiment a substance is decaying exponentially. Its mass, M grams, at time t minutes is given by M= 300e^-0. 5t

The initial mass is found by putting t=0 into the given equation, so the initial mass is 300g. When the mass has decreased to half its value, M=150g. This gives us 150=300e^-0.05t, so e^-0.05t=1/2. Natural l...
TT
Answered by Theo T. • Maths tutor
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« L’euthanasie devrait être légalisé » Partagez-vous ce point de vue ?

La question de l’euthanasie cristallise des tensions depuis toujours. On n’a qu’à penser aux manifestations ardentes à Londres en mai 2018 pour saisir l’ampleur de la polémique suscitée par ce problème. Tand...
Answered by • French tutor
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