Question

calculate the mass of 2.5 x 10^23 formula units of calcium phosphate

Answer 1

$\red{Answer}$

Formula units is used for salts made by ion namely cation and anion .

Formula units=moles×Na

Na=avagadro number which is 6.022×10²³

Moles=2.5×10²³/6.022×10²³=0.4151 moles

Mass=moles×molar mass

Mass=0.4151×310=128.6947gm

Answer=$\pink{128.69gm}$

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