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Chemistry
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2.4 g of magnesium reacts with 1.6 g of oxygen. What is the empirical formula of the oxide formed?

Ar of Magnesium = 24; Ar of Oxygen = 16

number of moles = mass divided by Ar

number of moles of Mg = 2.4/24 = 0.1

number of moles of Oxgen = 1.6/16 = 0.1

Answered by Katrina T. • Chemistry tutor
15846 Views

Can you explain what stoichometry actually is and why the ratio is not the same as the number of moles?

Stoichiometry is just a way of relating two species that react, in a ratio. EXAMPLE: 1A + 2B -> 3C Now usually this would be written as A + 2B -> 3C but I've written the 1 to exaggerate the point. N...

Answered by Michael R. • Chemistry tutor
4859 Views

What mass of CO2 will be produced when 50 g of CaCO3 decomposes?

CaCO3 decomposition:

CaCO3 -> CaO + CO2

The first thing to do here is to calculate the relative formula mass of CaCO3 and CO

Answered by Joshua H. • Chemistry tutor
92253 Views

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