Question
9) What is the mass of 2.75 moles of Al_(2)O_(3)
Answer
4.1
(228 Votes)
Bernadette
Professional · Tutor for 6 years
Answer
The mass of 2.75 moles of
is 280.39 grams.
Explanation
To find the mass of 2.75 moles of
, we first need to calculate the molar mass of
. Aluminum (Al) has an atomic mass of approximately 26.98 grams per mole, and oxygen (O) has an atomic mass of approximately 16.00 grams per mole. The formula
indicates that there are 2 aluminum atoms and 3 oxygen atoms in each molecule of aluminum oxide.The molar mass of
is calculated as follows:
Now that we have the molar mass, we can find the mass of 2.75 moles of
by multiplying the number of moles by the molar mass: