Jessie6754
Jessie6754 Jessie6754
  • 25-01-2016
  • Chemistry
contestada

how many formula units are there in 0.9876 grams of zinc hydroxide

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Willchemistry
Willchemistry Willchemistry
  • 25-01-2016
mass molar of  zinc hydroxide Zn(OH)2 = 99.424 g/mol

1 mole ----------> 99.424 g
 mole  ----------> 0.9876 g

mole = 0.9876 / 99.424

= 0.00993 moles of Zn(OH)2

1 mole ------------> 6.02x10²³ 
0.00993 ----------> units

units = 0.00993 * 6.02x10²³

= 5.977x10^21 formula units.

hope this helps!.


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