How do I solve this: 1.Find the mass of 120 cubic cm of chlorine 2.Find the volume of 0.1 moles of fluorine 3.How many moles are in 2000 cubic cm and 2 mol cubic dm of NaCl (aq) I need all the help I can get!! I really don't understand moles!
as much as i know, i've come up with these answers for Q1 - you cant work out the mass because you've only got the volume (you don't have the moles or the concentration)
for Q2 - you can't find the volume because you don't have the concentration (remember the formula: volume = moles / concentration )
for Q3 - to work out the moles, you need to use this formula: concentration = moles / volume and so when you rearrange this to find moles, you're formula should look like this: moles = concentration x volume
so, (to convert cm cubed into dm cubed we have to divide by 1000)
as much as i know, i've come up with these answers for Q1 - you cant work out the mass because you've only got the volume (you don't have the moles or the concentration)
for Q2 - you can't find the volume because you don't have the concentration (remember the formula: volume = moles / concentration )
for Q3 - to work out the moles, you need to use this formula: concentration = moles / volume and so when you rearrange this to find moles, you're formula should look like this: moles = concentration x volume
so, (to convert cm cubed into dm cubed we have to divide by 1000)
How do I solve this: 1.Find the mass of 120 cubic cm of chlorine 2.Find the volume of 0.1 moles of fluorine 3.How many moles are in 2000 cubic cm and 2 mol cubic dm of NaCl (aq) I need all the help I can get!! I really don't understand moles!
as much as i know, i've come up with these answers for Q1 - you cant work out the mass because you've only got the volume (you don't have the moles or the concentration)
for Q2 - you can't find the volume because you don't have the concentration (remember the formula: volume = moles / concentration )
for Q3 - to work out the moles, you need to use this formula: concentration = moles / volume and so when you rearrange this to find moles, you're formula should look like this: moles = concentration x volume
so, (to convert cm cubed into dm cubed we have to divide by 1000)
(2000/1000) x 2 = 4 moles
hope this helps*
I imagine kinji is using the assumption of 1 mole of any gas occupies 24dm3 under standard conditions if it's school level questions. Moles * 24 = volume of gas (dm3) is your equation to use to find out the first two.
I imagine kinji is using the assumption of 1 mole of any gas occupies 24dm3 under standard conditions if it's school level questions. Moles * 24 = volume of gas (dm3) is your equation to use to find out the first two.