Answer:
The molar mass of the unknown gas is 154.4 g/mol
Explanation:
Step 1: Data given
It takes 986 seconds for an unknown gas to effuse
It takes 811 seconds for chlorotrifluoromethane (CClF3) gas to effuse
Molar mass of chlorotrifluoromethane (CClF3) = 104.46 g/mol
Step 2: Calculate the molar mass of the gas
t1/t2/ √(M1/M2)
⇒with t1 = the time needed for the unknown gas to effuse = 986 seconds
⇒with t2 = the time needed for CClF3 to effuse = 811 seconds
⇒with M1 = the molar mass of the unknown gas = TO BE DETERMINED
⇒with M2 = the molar mass of CClF3 = 104.46 g/mol
986/811 = √(M1/104.46)
(986/811)² = M1 / 104.46
M1 = 154.4 g/mol
The molar mass of the unknown gas is 154.4 g/mol
Answer:
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Explanation:
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The hardness of water is determined primarily by the amount of calcium and magnesium it contains. ... Instead of having higher levels of calcium and magnesium, soft water tends to have higher concentrations of sodium, or salt.
Answer; chemical reaction
Answer:
The percent abundance of oxygen-18 is 1.9066%.
Explanation:
The average atomic mass of oxygen is given by:
Where:
m: is the atomic mass
%: is the percent abundance
Since the sum of the percent abundance of oxygen isotopes must be equal to 1, we have:
Hence, the percent abundance of O-18 is:
Hence, the percent abundance of oxygen-18 is:
Therefore, the percent abundance of oxygen-18 is 1.9066%.
I hope it helps you!
