Discuss two physical and two chemical properties of Nitrogen
1 answer:
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Answer:
Approximately (rounded to two significant figures.)
Explanation:
The unit of concentration is the same as
(moles per liter.) On the other hand, the volume of both the
solution and the original
solution here are in milliliters. Convert these two volumes to liters:
.
.
Calculate the number of moles of in that
of
solution:
.
reacts with
at a one-to-one ratio:
.
Coefficient ratio:
.
In other words, one mole of would neutralize exactly one mole of
. In this titration,
of
was required. Therefore, the same amount of
should be present in the original solution:
.
Calculate the concentration of the original solution:
.
Answer: A) 3.21 g
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.
We are given:
Mass of iron = 5.58 g
Mass of iron sulphide = 8.79 g
Mass of sulphur = x g
Total mass on reactant side = 5.58 + x
Total mass on product side = 8.79 g
Applying law of conservation of mass, we get:
Hence, the mass of reacting sulfur is 3.21 g.