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Calculate the empirical and molecular formula of the molecule giving rise to the molecular ion peak at 148 m/z. The percentage composition by weight is 64.80 % carbon, 13.62 % hydrogen, and 21.58 % oxygen

Step 1, pick out the important information from the question: Carbon: Hydrogen: Oxygen % by weight: 64.8: 13.62: 21.58 Step 2, from the periodic table, find out the relative atomic masses of each element: Ca...
OH
Answered by Olivia H. • Chemistry tutor
6794 Views

How will a catalyst affect the position of equilibrium?

A catalyst is something that speeds up the rate of reaction, without being consumed during the reaction. If a catalyst is used in a reaction, it will only speed up the forward and backward reaction, however ...
ZK
Answered by Zareen K. • Chemistry tutor
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Calculate the empirical and molecular formula of unknown compound A which gave an m/z of 181 in the mass spectrum for the molecular ion peak. Elemental analysis by combustion shows the compound is C 53%, O 35.4%, H 3.9% and N 7.7%.

C atomic mass -12 C percentage by composition : 53% Atomic ratio of C : 53/12= 4.417 H atomic mass -1 H percentage by composition : 3.9% Atomic ratio of H : 3.9/1=3.9 N atomic mass - 14 N percentage by compo...
AS
Answered by Aminat S. • Chemistry tutor
3825 Views

Explain why Xenon had a lower first ionisation enthalpy than Neon. (3 marks)

Xenon is further down Group 8 of the Periodic Table than Neon, hence has its outermost electrons in higher energy shells further away from the nucleus. Therefore, there are more full intermediate energy leve...
AM
Answered by Alex M. • Chemistry tutor
10925 Views

How would you find out whether a reaction is feasible?

For a reaction to be feasible at a given temperature, it must happen spontaneously, which means no extra energy needs to be put in for the reaction to occur. To find out whether a reaction is feasible, you c...
SG
Answered by Sarah G. • Chemistry tutor
70511 Views