The grams that are present in [tex]1.30 * 10^{24}[/tex] formula units of [tex]Ca(NO_3)_2[/tex] is 354 gram that can be calculated using number of moles.
(B) 354 g
One mole:
A mole is defined as [tex]6.02214076 * 10^{23}[/tex] of some chemical unit, be it atoms, molecules, ions, or others.
No. of formula units = no of moles × Avogadro's number
Number of moles = no of formula units/ Avogadro's number
No. of moles = [tex]1.30*10^{24}/6.022*10^{23}[/tex]
No. of moles = 2.159 moles
The Number of moles is defined as the given mass over molar mass.
No. of moles = Mass / Molar mass
Mass = no. of moles× molar mass
Mass =2.159×164
Mass = 354.15 gram
Thus, option B is correct.
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