White light, which consists of all frequencies, forms which type of spectrum?
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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:
Answer: 59 grams
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. Thus chemical equations are balanced.
Given: mass of hydrogen = 6.6 g
mass of oxygen = 52.4 g
Mass of products = Mass of hydrogen + mass of oxygen = 6.6 +52.4 = 59 g grams
Thus mass or reactant = mass of water
Mass of reactants = mass of products = 59 g
Thus the mass of water initially present was 59 g.