Final answer:
To find the mass of MgCl₂, we need to use the given number of formula units and conversion factors. By calculating the number of moles and then multiplying it by the molar mass of MgCl₂, we can determine the mass of MgCl₂ to be 132g.
Step-by-step explanation:
The question is asking for the mass of MgCl₂ in grams, given the number of formula units which is 8.34 x 10^23. To solve this problem, we need to use the given information and conversion factors. Based on the molar mass of MgCl₂ and the given number of formula units, we can calculate the mass of MgCl₂.
Given:
Number of formula units = 8.34 x 10^23
Molar mass of MgCl₂ = 95.21 g/mol
Calculation:
Number of moles of MgCl₂ = Number of formula units / Avogadro's number
Mass of MgCl₂ = Number of moles of MgCl₂ x Molar mass of MgCl₂
Using the above formula:
Number of moles of MgCl₂ = (8.34 x 10^23) / (6.022 x 10^23) = 1.384
Mass of MgCl₂ = 1.384 x 95.21 = 131.905g
Therefore, the mass of MgCl₂ is 132g.