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Chemistry
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Explain why an atom has no overall charge.

An atom is comprised of protons, neutrons, and electrons. Protons have positive charge and the number of protons is dictated by the proton number, which is the same as the number of electrons, which have ...

JC
Answered by James C. Chemistry tutor
17740 Views

Write down the equation for the Gibbs Free Energy change of a reaction. Hence explain why, for a spontaneous endothermic reaction, there must be an increase in the total entropy.

Gibbs Free Energy change: (delta)G = (delta)H - T(delta)S For a spontaneous chemical reaction, (delta)G must be negative. An endothermic reaction has a positive (delta)H value therefore, in order for the ...

JC
Answered by James C. Chemistry tutor
3337 Views

What does reversible mean?

Reversible is a term used for certain reactions that never reach a final stage. So imagine we have A and B reacting together to form C, and we say that this reaction is reversible. So at a point in time, ...

AT
Answered by Antonis T. Chemistry tutor
2211 Views

What is the rate of a reaction and how can you determine it experimentally?

The rate of a reaction is the rate at which reagents are used up and product are formed. Reaction rates depend on concentration. A typical rate law is rate=k*[A]m*[B]n. To find the v...

AC
Answered by Antonia C. Chemistry tutor
2060 Views

5.95g of potassium bromide was dissolved in 400cm3 of water. 1) calculate its molarity, 2)its concentration in g/dm3.

  1. 0.125 M 2) 14.875 g/dm3
NF
Answered by Natalie F. Chemistry tutor
5283 Views

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