34.59%
Explanation:
In order to calculate the mass percent of aluminum in that ionic compound, we're going to need two things:
1: The formula mass of the entire compound
2: The atomic mass of aluminum
The formula mass of aluminum hydroxide is
78.00
g
m
o
l
because:
26.98
g
m
o
l
+
3
(
16.00
g
mol
)
+
3
(
1.0079
g
mol
)
=
78.00
g
m
o
l
We already know the atomic mass of aluminum since that's already given.
Now, we have to use the following equation:
https://wilsonsch3u-01-2012.wikispaces.com/Unit+4+Moles?responseToken=6fbe1bc52003b1c7d0a470e50127b3a2
https://wilsonsch3u-01-2012.wikispaces.com/Unit+4+Moles?responseToken=6fbe1bc52003b1c7d0a470e50127b3a2
The numerator represents the mass of the desired atom, which is Al in our case, and the denominator represents the mass of the entire compound. You just divide the two and multiply by 100 to obtain the percent composition:
Mass of Al
Molar Mass of Al(OH)
3
×
100
%
26.98 g/mol
78.00g/mol
×
100
%
=
34.59
%
Movement from place to palce
Answer:
1813.74g
Explanation:
Given parameters:
Number of moles of radon = 8.17moles
Unknown:
Mass of radon = ?
Solution:
To solve this problem, we use the expression below:
Number of moles = 
Molar mass of radon = 222g/mol
Now insert the parameters and solve;
Mass of radon = Number of moles x molar mass
= 8.17 x 222
= 1813.74g
Objects in the fountain appear to be somewhere but isnt
12% ABV would be the best answer
