Answer:
C
Explanation:
The oxidation number of Sulphur in SO4^2- is;
x + 4(-2) = -2
x - 8 = -2
x = -2 + 8
x = 6
Now,
the oxidation number of sulphur in H2SO3 is
2 (1) + x + 3(-2) = 0
2 + x -6 = 0
-4 + x = 0
x = 4
Hence, the oxidation number of sulphur changed from +6 to +4 which signifies gain of two electrons as shown in option C.
Density is mass divided by volume, so the answer is B.
Atoms of different element can not have same atomic number because only same type of atoms combine to form element. Atoms belonging to different element can have different atomic number. Therefore, the ore of aluminum is Bauxite.
<h3>
What is element?</h3>
Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Ore is a naturally occurring solid material from which a metal or valuable mineral can be extracted profitably. The ore of aluminum is Bauxite.
Therefore, the ore of aluminum is Bauxite.
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55.8 g I had the same question a queen hole ago and this was the answer
