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Outline how a student could identify between an aldehyde and a ketone, and state the result they would observe.

There are two possible answers here. 1) Add Tollens reagent - the student would see a silver mirror form in the test tube containing the aldehyde. 2) Add Benedicts reagent - te student would see a brick r...

AG
1711 Views

Which homologous series has the general formula CnH2n+2?

The answer to this question is the alkane series. You can work this out using the following method: Becuase each carbon must make four bonds to complete it outer shell of electrons, there must be double t...

AG
Answered by Alexander G. UCAT tutor
11064 Views

Two particles A and B of mass 2kg and 3kg respectively are moving head on. A is moving at 5m/s and B is moving at 4m/s. After the collision, A rebounds at 4m/s. What is the speed of B and what direction is it moving in?

Using conservation of momentum, m1u1 + m2u2 = m1v1 + m2v2, set m1 = 2kg, m2 = 3kg, u1 = 5m/s, u2 = -4m/s and v1 = -4m/s. Substitute these into the equation to get 25 + 3(-4) = 2*(-4) + 3*v2 10 - ...

AS
Answered by Amber S. Maths tutor
4654 Views

An unknown capacitor is charged to 6v, its maximum value, then discharged through a 1k ohm resistor. If the capacitor voltage is 3v, 0.3 seconds after starting to discharge, what is the capacitance of the unknown capacitor?

To start, the equation to use can be identified as the capactior discharge equation V(t) = Vmaxe-t/RC. From here, we can see that this equation can be solved to give capacitance, and...

AR
Answered by Alexander R. Physics tutor
3055 Views

Calculate the pH change when water is added to 25.0 ml of 0.250M NaOH to form a 1.00l solution.

The initial [-OH] is 0.250M since NaOH releases 1 mole of -OH per mole of base. Using Kw=[H+][-OH], [H+]=(110-14)/0.250=410-14M (note remember units). Hence the initial pH=-...

MS
Answered by Milind S. Chemistry tutor
15087 Views

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