There are 1.26 x 10²³formula units in 8.823 g of CaH₂
There are 6.022×10²³ in 1 mole of anything, including formula units
Molar mass of CaH₂= 40+2= 42g/mol
Number of moles in 8.823 g of CaH₂⇒ 8.823 x( 1/42)= 0.210 mol CaH₂
number of formula Units = 0.210 x(6.022 x10²³) = 1.26 x 10²³
,The formula units of any compound are determined by multiplying the moles of the given compound by the Avogadro number
A formula unit is the lowest whole number ratio of ions in an ionic compound.
The Units within a formula are atoms of the element present, while coefficients are moles.
learn more about formula units here-
.-https://brainly.com/question/26388921
#SPJ9
