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What are the three different physical states and how do they differ?

There are three different physical state configurations of a substance, solid, liquid and gas. The different states are caused by the arrangement and movement of the particles that make up that substance....

Answered by Samuel W. • Chemistry tutor

2020 Views

Metals can be extracted fromt their oxides via the process of electrolysis. Positive metal ions are attracted to the negative electrode. explains what happens at the negative electrode. (2 marks)

Metal ions gain electrons to form metal atoms.(Eg Al3+ + 3e- ----> Al)

Answered by Tamsin D. • Chemistry tutor

1577 Views

Describe the bonding in i)NaCl, ii) HCl, iii) Mg

Sodium chloride forms an ionic bond, between metallic sodium and non-metallic chlorine. An atom of sodium transfers an electron to an atom of chlorine, forming a positive...

Answered by Yasmin B. • Chemistry tutor

14140 Views

There are two stable isotopes of Bromine, Br-79, Br-81. If a sample of Br2 is fed into a mass spectrometer, how many peaks would be observed in the spectrum?

There should be five peaks. In the process of bombarding the Br2 molecule with electrons to charge it, the molecule can fragment into 2 Br atoms. We should therefore expect to see peaks at 79 and 81 m/z. ...

Answered by Tim H. • Chemistry tutor

10439 Views

Calculate the pH of a 0.025 mol dm-3 solution of methanoic acid. For HCOOH, Ka = 1.58 x 10-4 mol dm-3

This question is an acid calculation question so it requires you to recall key formulas relating to weak acids. As the Ka of HCOOH has been given, I would start by writing an expression for Ka. Ka= [HCOO-...

Answered by Radia H. • Chemistry tutor

13484 Views