Search our library of homework questions

Top answers

All subjects

All levels

Devise a simple synthetic route to an amide from a carboxylic acid. Give a mechanism for the final step and explain why the reagents are not added 1:1 in the final step

1st step: SOCl₂ or PCl₃ to form an acyl chloride, which is now significanlty more electrophilic based on leaving gorup abiliity, hence an amine can now attack the acyl chloride to fo...

Answered by Elliot B. • Chemistry tutor

2830 Views

A transmitter from a researcher's boat sends a signal to the seabed of waves speed 300m/s and it takes 5 seconds for the signal to return back to the boat. Calculate the depth of the sea there.

distance=speed*time

distance=300*5

=1500

1500/2 (as signal travels back and forth)=750m

Answered by Tani A. • Physics tutor

2202 Views

The supply function for the production of good A is P=50+45Q. The demand function is P= 100-5Q. Find the equilibrium price and quantity.

At P_Qe supply equals demand sowe set equations equal to each other and solve as symoltaneous equations: 50+45Q=100-5Q

then 50Q=50

so Q_e=1.

By ...

Answered by Peter K. • Economics tutor

2287 Views

Find two values of k, such that the line y = kx + 2 is tangent to the curve y = x^2 + 4x + 3

There will be intersection when x^2 + 4x + 3 = kx + 2. Our goal is to find the values of k which would only give one solution to this quadratic equation, which would make the lines 'tangent' to each other...

Answered by Andrew N. • Maths tutor

35235 Views