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How many Protons, Neutrons and Electrons are there in an atom of Silicon, Si?

Using a copy of the periodic table, look up the Mass and Atomic numbers of Silicon. Mass number = 28; Atomic number = 14. The Atomic number is equivalent to the number of Protons in an atom, so there are ...

Answered by Eloise S. • Chemistry tutor

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Describe how a sample of copper chloride crystals could be made from copper carbonate and dilute hydrochloric acid.

To make crystals of copper chloride from copper carbonate andd dilute HCl, you will firstly need to add an excess of copper carbonate to the dilute HCl (keep adding until no more reacts). Next, take the s...

Answered by Sian J. • Chemistry tutor

29308 Views

Calculate the amount of moles in 36 grams of carbon

We need to use the equation : Moles=Mass/MrSubstitute in value : moles= 36/12Therefore number of moles in 36 grams of carbon is 3.

Answered by Ramisha K. • Chemistry tutor

15794 Views

Describe dynamic equilibrium with reference to a process you have been learning in class.

Dynamic equilibrium is when the forward and reverse reactions happen at the same time and rate so there is no overall net change. A reaction that can be used as an example is the Haber Process:

Answered by Hasham S. • Chemistry tutor

2125 Views

"A chromium compound contains 28.4% sodium and 32.1% chromium by mass, while the rest is oxygen. What is the empirical formula of this compound?"

Start with the definition of empirical formula so we know what we are trying to work out. Empirical formula is the simplest whole-number ratio of elements in a compound. First, l...

Answered by Mia P. • Chemistry tutor

5395 Views