## Lukecrayonz Group Title How many kilograms are in 4 moles of Na2CO3? 2 years ago 2 years ago

1. zbay Group Title

Whats the molar mass of that? I don't have a periodic table so I keep asking

2. Lukecrayonz Group Title

zbay, http://www.webqc.org/mmcalc.php for future use:)

3. Lukecrayonz Group Title

Molar mass of Na2CO3 is 105.9886 g/mol

4. zbay Group Title

$4 mole Na_2CO_3(\frac{105.99 g Na_2CO_3}{1 mole Na_2CO_3})(\frac{1 kg}{1000 g })=.424 kg Na_2CO_3$

5. zbay Group Title

Is the equation loading or does it look all crazy for you?

6. Lukecrayonz Group Title

Looks fine:)

7. zbay Group Title

ok cool

8. anubhuti Group Title

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

9. Xishem Group Title

$46+12+48=106$

10. anubhuti Group Title

now 1 mole of sodium carbonate has 96 grams so 4 moles will have 4x106=424 oh yeah sry

11. anubhuti Group Title

oops sry now that means one mole of Na2CO3 will have 106 grams

12. anubhuti Group Title

thanks

13. Xishem Group Title

To get the final answer, you need to convert to kg (:.

14. anubhuti Group Title

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?

15. Xishem Group Title

16. anubhuti Group Title

yeah...

17. anubhuti Group Title

hah i again forgot to multiply by 4 wat a shame yeah k the answer is .424 kg i m really sry

18. Xishem Group Title

Don't be sorry! We're all learning here.