Which of the following best explains why a structural formula of a chemical compound is more useful than a molecular formula?
2 answers:
Answer: the correct answer is (A).
Explanation:
Structural formula not only tells us about the number and types of atoms in a molecule but also tells us about the bonded positions of all the atoms in a molecule of that particular compound.
Molecular structure only tells us about the numbers of atoms and types of atoms present in a molecule of that particular compound.
For example: Molecular formula of propanone and propanal are same that is but structural formula is different that
for propane and
for propanal. Here structural formula is showing that how the atoms in propanone and propanal are bonded together.
Hence, the correct answer is option (A).
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Answer:
The mass ratio of zinc to sulfide is 85:42.
2.5559 kg of Zn are in 3.82 kg of ZnS.
Explanation:
a) Mass of zinc sulfide = 254 g
Mass of zinc in a zinc sulfide sample = 170 g
Mass of sulfide in zinc sulfide sample = x
254 g = 170 g+ x
x = 84 g
The mass ratio of zinc to sulfide:
b) Mass of zincsulfide sample = 3.83 kg
The mass ratio of zinc to sulfide is 85:42.
Let the mass of zinc and sulfide be 85x and 42x respectively:
85 x+ 42 x=3.82 kg
x =0.03007 kg
Mass of an zinc= 85x=85 × 0.03007 kg= 2.5559 kg