Moles of Hydrogen Watch

matt2minger
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#1
Report Thread starter 10 years ago
#1
Hi,

How many moles of hydrogen gas will be produced from a reaction that involved 40g of the gas?(hydrogen molecular mass = 2.0)

Any ideas?

Thanks
Matt
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1721
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#2
Report 10 years ago
#2
moles= grammes/rams
so 20
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matt2minger
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#3
Report Thread starter 10 years ago
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moles= grammes/rams
What are rams?
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#4
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relative atomic mass but molecular mass works aswell
but rams rhymes with grammes
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G O D I V A
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moles=\frac {mass}{molar mass}

mass is in grams or kg
molar mass is the weight of the element (see periodic table)
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(Original post by G O D I V A)
moles=\frac {mass}{molar mass}

mass is in grams or kg
molar mass is the weight of the element (see periodic table)
but it really does matter whether grams or Kg, dependent on what the molar mass is measured in.

either that or do some sort 10^3 multiplying, which unless you do physics isnt too easy.
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