Moles homework help

SBizzy

10

Need help with my homework.

Reply 1

515

6

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?

Reply 2

SBizzy

OP

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?

I know what there measured in, just don't know how to structure the equation.

(edited 6 years ago)

Reply 3

515

6

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

Reply 4

RedGiant

22

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.

Reply 5

SBizzy

OP

10

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?

Reply 6

515

6

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

Reply 7

Ray_Shadows

21

trust me , everytime i come across a moles question i always write the equation triangle to help me

Reply 8

515

6

Question 5: Convert cm³ to dm³, the times the value by mol/dm³ to find the amount of moles in the substance

Reply 9

SBizzy

OP

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?