Molecular weight Flashcards
1
Q
What are molecular weight examples?
A
Ca has 40.078g/mol
mole of C is 12.011 g/mol
1mol CH4=16.04g CH4
2
Q
A mole is 6.022x10^23 of…
A
anything (even eggs!)
3
Q
What is a mole?
A
mass of a substance containing same # of fundamental units as there are atoms in grams of an element
4
Q
How many atoms in 12g of C?
A
6.022x10^23
5
Q
Does 1 mol of Au have more atoms than 1 mol of S?
A
no, they have the same
6
Q
Why do we care about the weight of atoms?
A
we discuss coefficients of balanced chemical equations in terms of moles
7
Q
What is stoichiometry?
A
Studies proportions of a reaction
Relationship between reactants and products
Determine how much went in and how much went out
Measurement of the elements
8
Q
1 mol of reactant =
A
1 mol of product
