Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with th
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Answer : The final pressure of the gas will be, 26.8 kPa
Explanation :
According to the Boyle's law, the pressure of the gas is inversely proportional to the volume of the gas at constant temperature of the gas and the number of moles of gas.
or,
or,
where,
= initial pressure of the gas = 209 kPa
= final pressure of the gas = ?
= initial volume of the gas = 10.0 L
= final volume of the gas = 78.0 L
Now put all the given values in this formula, we get the final pressure of the gas.
Therefore, the final pressure of the gas will be, 26.8 kPa
Answer: The molarity of the malonic acid solution is 0.08335 M
Explanation:
To calculate the molarity of acid, we use the equation given by neutralization reaction:
where,
are the n-factor, molarity and volume of acid which is
are the n-factor, molarity and volume of base which is NaOH.
We are given:
Putting values in above equation, we get:
Thus the molarity of the malonic acid solution is 0.08335 M
Answer : The percent purity of in the original sample is 87.94 %
Explanation :
The given balanced chemical reaction is:
First we have to calculate the mass of Fe.
Molar mass of Fe = 55.8 g/mole
Now we have to calculate the moles of
From the balanced chemical reaction we conclude that,
As, 2 moles of Fe produced from 1 mole of
So, of Fe produced from
mole of
Now we have to calculate the mass of
Molar mass of = 159.69 g/mole
Now we have to calculate the percent purity of in the original sample.
Mass of original sample =
Therefore, the percent purity of in the original sample is 87.94 %