Chemistry question about finding moles?

  • Thread starter Thread starter Sonny
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Sonny

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please help!
i dont understand it

you combine 500 ml of 2.0 M ZnCl2 with 750 ml of 4.0 M K2S.

How many moles of ZnCl2 do you have?
How many moles of K2S do you have?
 
Work with each thing separately.

500 mL = 0.5 L
Therefore, 0.5 L x 2 mol/L =
1 mole of ZnCl2

750 mL = 0.75 L
Therefore, 0.75 L x 4 mol/L =
3 moles of K2S

Remember that M = moles per liter.

- Anonymous
 
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