Answer:
Explanation:
0.3(125)+0.7(126)=37.5+88.2=125.7
2. The most prevalent isotope is 32, since the average is very close to this value.
mass of sulfur = 96 g no of moles of sulfur dioxide in
molecules =
= 2 moles therefore mass of sulfur dioxide = moles × atomic number = 2 × (16 + 32) = 96
The solution's concentration is 4.25 M
Explanation
molarity=moles/volume in liters
moles = mass/molar mass
the molar mass of HF is calculated as 19 + 1 = 20 g/mol
hence, moles = 17.0 g / 20 g/mol = 0.85 moles
volume in liters = 2 x10^2ml/1000 = 0.2 liters
thus, molarity = 0.85/0.2 = 4.25 M
In order to determine the new pressure, we can apply Boyle’s law to connect these two situations (Boyle’s law applies here since we assume the temperature stays constant). According to Boyle’s law:
P1V1 = P2V2,
where “P” indicates pressure and “V” denotes volume. For the first situation, the pressure and volume are 215 torr and 51 mL, respectively, while the second situation has a volume of 18.5 L (which is equal to 18,500 mL), with pressure being unknown—let's label it “x”. Substituting the values into the equation gives us:
(215 torr)(51 mL) = (“x” torr)(18,500 mL)
x = 0.593 torr
Thus, the resulting pressure from the gas will be 0.593 torr.
I hope this clarifies things!
