Simply the name given to a certain number: 6.023x10power 23
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What is the number of a mole called?
Avogadro's number or constant
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Equation for the number of moles
No. of moles= mass in g/ RFM
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Eg. How many moles are there in 66g of CO2?
12+(16x2)=44 66/44=1.5 moles
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What does the empirical formula give you?
The smallest whole number ratio of atoms in a compound.
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How do you get the empirical formula? (Method)
1. List the elements in the compound. -Underneath, write their experimental % or masses. -Divide each % or mass by the RAM for the element. -Turn the numbers into a nice ratio and simplify.
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What does the molecular formula of a compound tell you?
The actual number of atoms of each element in a single molecule.
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