kookiekenzie kookiekenzie
  • 15-11-2020
  • Chemistry
contestada

How many grams are in 9.30 x 10-2 moles of calcium phosphate, Caz(PO3)2?
a. 25.9 g b. 17.65 g
c. 0.064 g
d. 259 g

Respuesta :

PhantomWisdom PhantomWisdom
  • 21-11-2020

Answer:

25.9 g

Explanation:

Given that,

No of moles of calcium phosphate, [tex]n=9.3\times 10^{-2}[/tex]

We need to find how many grams of calcium phosphate has this much of no of moles.

Mass divided by molar mass is equal to the no of moles on a molecule.

The molar mass of calcium phosphate is 310.18 g/mol

Using the concept of no of moles as follows :

[tex]n=\dfrac{m}{M}\\\\m=n\times M\\\\m=9.3\times 10^{-2}\times 310.18\\\\m=28.84\ g[/tex]

Out of given options, option (a) i.e. 25.9 g is the correct answer.

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