Lukecrayonz
  • Lukecrayonz
How many kilograms are in 4 moles of Na2CO3?
Chemistry
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Whats the molar mass of that? I don't have a periodic table so I keep asking
Lukecrayonz
  • Lukecrayonz
zbay, http://www.webqc.org/mmcalc.php for future use:)
Lukecrayonz
  • Lukecrayonz
Molar mass of Na2CO3 is 105.9886 g/mol

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anonymous
  • anonymous
\[4 mole Na_2CO_3(\frac{105.99 g Na_2CO_3}{1 mole Na_2CO_3})(\frac{1 kg}{1000 g })=.424 kg Na_2CO_3\]
anonymous
  • anonymous
Is the equation loading or does it look all crazy for you?
Lukecrayonz
  • Lukecrayonz
Looks fine:)
anonymous
  • anonymous
ok cool
anonymous
  • anonymous
let me first tell u how to calculate molar mass ok? u need to find of Na2CO3 so add the molar masses of the elements together multiplying them with their respective subscripts so here it goes like this Na= 23 C=12 O=16 so Na2CO3=2(23)+12+3(16)=46+12+48=96
Xishem
  • Xishem
\[46+12+48=106\]
anonymous
  • anonymous
now 1 mole of sodium carbonate has 96 grams so 4 moles will have 4x106=424 oh yeah sry
anonymous
  • anonymous
oops sry now that means one mole of Na2CO3 will have 106 grams
anonymous
  • anonymous
thanks
Xishem
  • Xishem
To get the final answer, you need to convert to kg (:.
anonymous
  • anonymous
well that is easy enough... from here the question can b done by the asker himself yhe main question has been solved isnt it? even so the answer is .106 kg ok?
Xishem
  • Xishem
Well, zbay has already answered the question. It's .424kg of Na_2CO_3
anonymous
  • anonymous
yeah...
anonymous
  • anonymous
hah i again forgot to multiply by 4 wat a shame yeah k the answer is .424 kg i m really sry
Xishem
  • Xishem
Don't be sorry! We're all learning here.

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