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# Moles.... watch

1. can someone check to see if my answers are right:

What is the amount, in moles, of:
q) 6.41 g of SO2 molecules
a) 0.1 mol

q) 10g of sodium hydroxide
a) 0.25 mol

What is the mass of:
q) 0.01 mol of NH4Cl
a) 0.535g

q) 0.125 mol of sulphate ions, SO4 2-
a) 4g?
2. (Original post by Mimiiil)
can someone check to see if my answers are right:

What is the amount, in moles, of:
q) 6.41 g of SO2 molecules
a) 0.1 mol

q) 10g of sodium hydroxide
a) 0.25 mol

What is the mass of:
q) 0.01 mol of NH4Cl
a) 0.535g

q) 0.125 mol of sulphate ions, SO4 2-
a) 4g?
No idea if they're right but your significant figures are way off.
3. can someone check to see if my answers are right:

What is the amount, in moles, of:
q) 6.41 g of SO2 molecules
a) 0.1 mol

q) 10g of sodium hydroxide
a) 0.25 mol

What is the mass of:
q) 0.01 mol of NH4Cl
a) 0.535g

q) 0.125 mol of sulphate ions, SO4 2-
a) 4g?
4. Haha i dont have a periodic table on me, but as long as you used the mass/molar mass=amount of moles formula, you should be fine
5. (Original post by Mimiiil)
can someone check to see if my answers are right:

What is the amount, in moles, of:
q) 6.41 g of SO2 molecules
a) 0.1 mol

q) 10g of sodium hydroxide
a) 0.25 mol

What is the mass of:
q) 0.01 mol of NH4Cl
a) 0.535g

q) 0.125 mol of sulphate ions, SO4 2-
a) 4g?
They're all right apart from the last one. The fact that it's an ion is irrelevant - just do it exactly like the previous question and you'll be fine. You can immediately tell it's wrong since sulfur has a RAM of 32.1 and an eighth of that is already bigger than 4g.
6. (Original post by Mimiiil)
can someone check to see if my answers are right:

What is the amount, in moles, of:
q) 6.41 g of SO2 molecules
a) 0.1 mol

q) 10g of sodium hydroxide
a) 0.25 mol

What is the mass of:
q) 0.01 mol of NH4Cl
a) 0.535g

q) 0.125 mol of sulphate ions, SO4 2-
a) 4g?
Please don't double post the same questions ...

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