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A student reacts calcium carbonate with hydrochloric acid. Design an experiement that would allow the student to determine the rate of reaction. Draw the set up.

The reaction between calcium carbonate and hydrochloric acid produces carbon dioxide. The carbon dioxide could be collected in a gas syringe or in a measuring tube inverted and filled with water. The ra...

Answered by Katy A. • Chemistry tutor

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Explain why C-12 and C-14 are isotopes of Carbon. (3 marks)

Same number of protons (6 protons - atomic number) and different number of neutrons (6 neutrons in C-12 and 8 neutrons in C-14).

Answered by Christian S. • Chemistry tutor

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A student wishes to investigate the effect of surface area on the rate of reaction between marble chips and hydrochloric acid. Which variables should he control?

Concentration of HCl, Mass of marble chips (use excess HCl).

Answered by Alfie B. • Chemistry tutor

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Diamond is very hard because:

It is a giant covalent structure.

Answered by Rifat M. • Chemistry tutor

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Draw a diagram that represents the electronic arrangement of a fluorine atom.

Electrons are arranged in different shells (sometimes described as an energy levels) around the nucleus with the innermost shell being filled first and then working outwards. The first shell can hold a ma...

Answered by Izabella A. • Chemistry tutor

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