8.99g of scandium and 8.99g of oxygen react to give scandium oxide and a left -over of oxygen 4.19g, what percentage by mass, of scandium oxide is the oxygen
8.99g of scandium and 8.99g of oxygen react to give scandium oxide and a left -over of oxygen 4.19g, what percentage by mass, of scandium oxide is the oxygen
8.99 - 4.19 = 4.8 g oxygen used.
total mass is 8.99 Sc + 4.8 O = 13.79
% O = (4.8/13.79)*100 = ?
m
O
r
e
a
c
t
=
88.9
g
−
4.19
g
=
84.71
g
.
We determine the mass of the product by adding the initial mass of scandium, 88.9 g, and
m
O
r
e
a
c
t
, such that
m
S
c
2
O
3
=
88.9
g
+
84.71
g
=
173.61
g
. We proceed with the solution.
P
=
m
O
r
e
a
c
t
m
S
c
2
O
3
×
100
%
=
84.71
g
173.61
g
×
100
%
≈
48.8
%
O
P
=
m
O
r
e
a
c
t
m
S
c
2
O
3
×100% =
84.71
g
173.61
g
×100% ≈
48.8
%
O
Well, it seems like scandium and oxygen went on a little adventure! They mixed together and formed scandium oxide, but it looks like oxygen couldn't resist leaving a little souvenir behind, weighing 4.19g.
To find the percentage by mass of oxygen in scandium oxide, we need to compare the mass of oxygen in the leftover oxygen (4.19g) and the mass of scandium oxide that formed from the reaction (8.99g - 4.19g = 4.8g).
The total mass of oxygen in the leftover oxygen and scandium oxide is 4.19g, and the mass of oxygen in scandium oxide is 4.19g - 0g (since scandium is not oxygen) = 4.19g.
Now, let's calculate the percentage by mass:
Percentage by mass of oxygen in scandium oxide = (mass of oxygen in scandium oxide / total mass of oxygen in remaining oxygen and scandium oxide) × 100
Percentage by mass of oxygen in scandium oxide = (4.19g / 4.19g) × 100
Well, that's just about 100%! So the oxygen in scandium oxide is giving it its full attention. No wonder scandium oxide is such a sight to behold!
To find the percentage by mass of oxygen in the scandium oxide, we need to determine the mass of oxygen in the scandium oxide and then calculate the percentage.
1. Calculate the mass of oxygen in the scandium oxide:
- Mass of oxygen in the reactants = Mass of oxygen - Mass of left-over oxygen
- Mass of oxygen in the reactants = 8.99g - 4.19g = 4.80g
2. Calculate the mass of scandium oxide:
- Mass of scandium oxide = Mass of reactants - Mass of left-over oxygen
- Mass of scandium oxide = (8.99g + 8.99g) - 4.19g = 13.79g
3. Calculate the percentage by mass of oxygen in the scandium oxide:
- Percentage = (Mass of oxygen in the reactants / Mass of scandium oxide) x 100
- Percentage = (4.80g / 13.79g) x 100 = 34.84%
Therefore, the percentage by mass of oxygen in the scandium oxide is approximately 34.84%.
To solve this problem, we need to find the mass of scandium oxide and the mass of oxygen in the compound, and then calculate the percentage by mass of oxygen in scandium oxide.
First, let's calculate the mass of scandium oxide. We know that the total mass of scandium and oxygen is 8.99g + 8.99g = 17.98g. Since the mass of oxygen left over is 4.19g, we can subtract this from the total mass to find the mass of scandium oxide:
Mass of scandium oxide = Total mass - Mass of oxygen left over
Mass of scandium oxide = 17.98g - 4.19g
Mass of scandium oxide = 13.79g
Next, let's calculate the mass of oxygen in scandium oxide. We can subtract the mass of scandium from the total mass of scandium oxide:
Mass of oxygen in scandium oxide = Mass of scandium oxide - Mass of scandium
Mass of oxygen in scandium oxide = 13.79g - 8.99g
Mass of oxygen in scandium oxide = 4.80g
Finally, let's calculate the percentage by mass of oxygen in scandium oxide:
Percentage by mass of oxygen in scandium oxide = (Mass of oxygen / Mass of scandium oxide) x 100%
Percentage by mass of oxygen in scandium oxide = (4.80g / 13.79g) x 100%
Percentage by mass of oxygen in scandium oxide ≈ 34.8%
Therefore, the percentage by mass of oxygen in scandium oxide is approximately 34.8%.