Chemical formula for 2 butyene is
1 answer:
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Answer:
1.930 * 10⁻⁹ mg of Mn⁺² are left unprecipitated.
Explanation:
The reaction that takes place is:
Mn⁺² + S⁻² ⇄ MnS(s)
ksp = [Mn⁺²] [S⁻²]
If the pksp of MnS is 13.500, then the ksp is:
From the problem we know that [S⁻²] = 0.0900 M
We use the ksp to calculate [Mn⁺²]:
3.1623*10⁻¹⁴= [Mn⁺²] * 0.0900 M
[Mn⁺²] = 3.514 * 10⁻¹³ M.
Now we can calculate the mass of Mn⁺², using the volume, concentration and atomic weight. Thus the mass of Mn⁺² left unprecipitated is:
3.514 * 10⁻¹³ M * 0.1 L * 54.94 g/mol = 1.930 * 10⁻¹² g = 1.930 * 10⁻⁹ mg.
<u>Answer:</u> The heat capacity of calorimeter is
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
Given mass of ethanol = 21.8 g
Molar mass of ethanol = 46.07 g/mol
Putting values in above equation, we get:
To calculate the enthalpy change of the reaction, we use the equation:
where,
= amount of heat released = ?
n = number of moles = 0.473 moles
= enthalpy change of the reaction = -1235 kJ/mol =
(Conversion factor: 1 kJ = 1000 J)
Putting values in above equation, we get:
To calculate the heat capacity of calorimeter, we use the equation:
where,
q = heat absorbed by the calorimeter =
c = heat capacity = ?
= change in temperature =
Putting values in above equation, we get:
Hence, the heat capacity of calorimeter is