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Chemistry
Donovan
3 June, 02:38
Moles of Zn (NO3) 2 in 131.50g of this substance.
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Tiara
3 June, 03:00
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number of moles = mass / molecular mass
mass=131.50g
molecular mass of Zn (NO3) 2 = 189.39 g/mol
number of moles = 131.50 g/189.39 g/mol = 0.69433 mol
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