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17-10-2021
Chemistry

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moles of Zn(NO3)2 in 143.50 g of this substance
Express your answer in moles to four significant figures.

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17-10-2021

Answer:

0.76 moles

Explanation:

mole = mass ÷ molar mass

mass = 143.50

molar mass = 189.36

189.36÷143.50 = 0.757 = 0.76

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