Some compounds are better known by their common names than by their systematic chemical names. Give the chemical formulas of the
1 answer:
Explanation:
(a) Dry ice is solid carbon dioxide and its chemical formula is solid .
(b) Sodium chloride is commonly known as salt in daily life. Hence, chemical formula of salt is NaCl.
(c) Laughing gas is also known as dinitrogen monoxide. Hence, its chemical formula is .
(d) Marble (chalk limestone) is chemically known as calcium carbonate. Hence, its chemical formula is .
(e) Baking soda is chemically known as sodium bicarbonate. Hence, its chemical formula is .
(f) Ammonia has a chemical formula as .
(g) Water has a chemical formula as .
(h) Milk of magnesia is a base and it is chemically known as magnesium hydroxide. Its chemical formula is .
(i) Epsom salt is most often found as heptahydrate of sulfate mineral epsomite. Its chemical formula is usually . If not present as a heptahydrate then its chemical formula is
where, value of x can be equal to 0 to 7.
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a. Elemental percent composition is the mass percent of each element in the compound.
The formula for mass elemental percent composition = (1)
The molecular formula of cisplatin is .
The atomic weight of the elements in cisplatin is:
Platinum,
Nitrogen,
Hydrogen,
Chlorine,
The molar mass of =
=
The mass of each element calculated using formula (1):
- Platinum, %
%.
- Nitrogen, %
%
- Hydrogen, %
%
- Chlorine, %
%
b. The given reaction of cisplatin is:
According to the balanced reaction, 1 mole of gives 1 mole of
.
Now, calculating the number of moles of in 100.0 g.
Number of moles =
Molar mass of =
Number of moles of =
.
Since, 1 mole of gives 1 mole of
. Therefore, mass of cisplatin is:
For mass of :
Molar mass of =
Since, 1 mole of gives 2 mole of
. Therefore, mass of
is: