High School

How many grams of oxygen (O) are in 35.8 grams of [tex]\text{Cu(NO}_3\text{)}_2[/tex]?

A. 16.0
B. 18.3
C. [tex]5.94 \times 10^{-23}[/tex]
D. [tex]3.39 \times 10^{23}[/tex]

Answer :

Final answer:

There are 419.576 grams of oxygen (O) in 35.8 grams of Cu(NO3)2.

Explanation:

To calculate the mass of oxygen (O) in 35.8 grams of Cu(NO3)2, we need to use the molar masses of Cu(NO3)2 and O. The molar mass of Cu(NO3)2 is 187.55 g/mol, and the molar mass of O is 16.00 g/mol.

We can use the formula:

Mass of element = (Molar mass of compound / Molar mass of element) * Mass of compound

Substituting the values:

Mass of O = (187.55 g/mol / 16.00 g/mol) * 35.8 g

Simplifying the expression:

Mass of O = 11.72 * 35.8 g

Mass of O = 419.576 g

Therefore, there are 419.576 grams of oxygen (O) in 35.8 grams of Cu(NO3)2.

Learn more about calculating the mass of a specific element in a compound here:

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