Answer: The number of moles of strontium bicarbonate is [tex]7.5\times 10^{-9}mol[/tex]
Explanation:
Formula units are defined as lowest whole number ratio of ions in an ionic compound. It is calculate by multiplying the number of moles by Avogadro's number which is [tex]6.022\times 10^{23}[/tex]
We are given:
Number of formula units of [tex]Sr(HCO_3)_2=4.55\times 10^{15}[/tex]
As, [tex]6.022\times 10^{23}[/tex] number of formula units are contained in 1 mole of a substance.
So, [tex]4.55\times 10^{15}[/tex] number of formula units will be contained in = [tex]\frac{1}{6.022\times 10^{23}}\times 4.55\times 10^{15}=7.5\times 10^{-9}mol[/tex] of strontium bicarbonate.
Hence, the number of moles of strontium bicarbonate is [tex]7.5\times 10^{-9}mol[/tex]
