BaCO3(s) → BaO(s) + CO2(g)

(a) A student heated a 10.0 g sample of barium carbonate until it was fully decomposed.

(i) Calculate the number of moles of barium carbonate the student used.

moles of barium carbonate =

Answers

Answer 1

number of moles = mass

molar mass

BaCO3 molar mass = 197.34 g/mol

mass = 10g

n = 10/197.34

n = 0.05moles.

The number of moles of barium carbonate used are 0.05moles.


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Match the following scientist with his experiment or contribution
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Who are scientists?

Scientists are those people who research in different fields, and they do discoveries of new things. They study nature and every fill for the earth to know more, and they discover and open new secrets of the earth to the people.

Albert Einstein is a famous scientist that discovered relativity and the photoelectric effect. Neil Bohr explained the model of an atom, by which every matter is made up of.

Thus, the correct match is :

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Answer:

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Answer:

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