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Chemistry
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Calculate the percentage by mass of nitrogen in an ammonia molecule (NH​​​​​​​3) . Take the relative atomic masses of hydrogen and nitrogen to be 1 and 14 respectively.

Calculating the mass of 1 molecule of ammonia:

Mass = ( Number of hydrogen atoms x Mass of hydrogen atom) + ( Number of nitrogen atoms x Mass of nitrogen atoms)

Mass = ( 3 x 1 ) + ( 1...

Answered by Nic D. Chemistry tutor
25656 Views

I don't understand how to calculate initial rates of reaction based on experimental data

The experimental data given in the question will serve as a basis for comparison when answering the question. You must compare the initial rates of reaction given to the concetrations of the rectants. For...

Answered by Elizaveta T. Chemistry tutor
5395 Views

How would you test for the presence of a phenol?

By adding Iron (III) Chloride to the solution and if it turns purple, it means a phenol is present. 

Answered by Rebecca N. Chemistry tutor
8823 Views

What is the difference between pH and pKa?

pH is the measure of the concentration of proton in an aqueous environment, which is denoted as: pH = -log[H3O+]. pKa however, is prefered when comparing how strong an acid is becaus...

Answered by Anthony M. Chemistry tutor
7483 Views

Why is phenol more reactive than benzene?

Benzene is made from an aromatic ring consisting of 6 carbon atoms and 6 hydrogen atoms, with delocalised electrons in the centre. Phenol has an additional hydroxy (-OH) group on the ring, and the oxygen ...

Answered by Erin L. Chemistry tutor
4322 Views

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