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# Moles homework help watch

1. Need help with my homework.
2. For question 1, if i gice you the hint that moles is measured in (mol), volume is measured in (dm³) and concentration is measured in (mol/dm³ (moles PER dm³), do you think you can work out an equation?
3. (Original post by 515)
For question 1, if i gice you the hint that moles is measured in (mol), volume is measured in (dm³) and concentration is measured in (mol/dm³ (moles PER dm³), do you think you can work out an equation?
I know what there measured in, just don't know how to structure the equation.
4. For q2: If you want to find the concentration in mol/dm³, all you do is divide the concentration in g/dm³ by the Mr
5. If you multiple the concentration in moldm^-3, by the molar mass, in gmol^-1, you get the 'mass concentration'. Use that to derive it.
6. (Original post by RedGiant)
If you multiple the concentration in moldm^-3, by the molar mass, in gmol^-1, you get the 'mass concentration'. Use that to derive it.
For question 5?
7. Question 1: Concentration (mol/dm³) = ? / ?. If you are not sure which order, have a guess and feel free to ask me whether you got it correct or not
8. trust me , everytime i come across a moles question i always write the equation triangle to help me
9. Question 5: Convert cm³ to dm³, the times the value by mol/dm³ to find the amount of moles in the substance
10. (Original post by 515)
For question 1, if i gice you the hint that moles is measured in (mol), volume is measured in (dm³) and concentration is measured in (mol/dm³ (moles PER dm³), do you think you can work out an equation?
Calculate the volume of 0.5 mol of carbon dioxide
11. (Original post by SBizzy)
Calculate the volume of 0.5 mol of carbon dioxide
I would also require the concentration
12. (Original post by SBizzy)
Calculate the volume of 0.5 mol of carbon dioxide
How do I find mr for CuCl2?

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