Refresh my mem.? Is the mass the molecular weight divided by # of molecules per mole=(Avogadro's)expand for

Question

me?

Answer 1

i think your confusing some terms here.

moles = mass / molecular weight.

1 mole = 6.023 X 10^23 entities (that is avogadros number)

which leads to

# entities = (mass / mw) *( avogadros number)

so that

mass = # entities * mw / avogadros number

where your calling entities molecules
and your calling molecules/mole avogadros number

so to answer your question...

the mass/# molecules present = mw/avogadros number
not mass = mw/avogadros number

Answer 2

Mass is the molecular weight times the number of molecules divided by Avogadro's number.

Answer 3

molecular weight is the weight, in grams, of 1 mole (units are grams/mole)

or

molecular weight is the weight, in grams, of 6.022 x 10^23 molecules (units are grams/6.022 x 10^23 molecules). 6.022 x 10^23 is called Avogadro's number.

If you have mass and want to know how many moles, you divide by the molecular mass (unit analysis is: g x mole/g = g)

If you have mass and want to know how many molecules, you divide by the molecular mass and then multiply by Avogardro's number (6.022 x 10^23) (unit analysis is g x mole/gram x molecules/mole = molecules)

Answer 4

do not understand the question.........

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