Asked by JP
A 0.370mol sample of a metal oxide (M2O3) weighs 55.4g.
How many moles of O?
How many grams of M?
And what is the unknown element M?
How many moles of O?
How many grams of M?
And what is the unknown element M?
Answers
Answered by
DrBob222
moles x molar mass = grams.
You have moles and grams, calculate molar mass.
I would subtract 48(3x16=48 for 3 atoms O) from the molar mass and divide the remainder by 2 to get the atomic mass of M and from there look on the periodic table for the element M.
moles O = moles M2O3 x (3 atoms O/1 mole M2O3).
Post your work if you get stuck.
You have moles and grams, calculate molar mass.
I would subtract 48(3x16=48 for 3 atoms O) from the molar mass and divide the remainder by 2 to get the atomic mass of M and from there look on the periodic table for the element M.
moles O = moles M2O3 x (3 atoms O/1 mole M2O3).
Post your work if you get stuck.
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