Answer:
2.7 °C.kg/mol
Explanation:
Step 1: Calculate the freezing point depression (ΔT)
The normal freezing point of a certain liquid X is-7.30°C and the solution freezes at -9.9°C instead. The freezing point depression is:
ΔT = -7.30 °C - (-9.9 °C) = 2.6 °C
Step 2: Calculate the molality of the solution (b)
We will use the following expression.
b = mass of solute / molar mass of solute × kilograms of solvent
b = 102. g / (162.2 g/mol) × 0.650 kg = 0.967 mol/kg
Step 3: Calculate the molal freezing point depression constant Kf of X
Freezing point depression is a colligative property. It can be calculated using the following expression.
ΔT = Kf × b
Kf = ΔT / b
Kf = 2.6 °C / (0.967 mol/kg) = 2.7 °C.kg/mol
Since you provide no options, Henry Moseley measured a property linked to Periodic Table position. After his revisions to the periodic table, Atomic number became more meaningful and the three pair of elements that seemed to be in the wrong order could be explained
Answer:
Explanation:
From the question we are told that:
Power
Work
Generally the equation for Time t is mathematically given by
Therefore
This is false. The amount of electrons in lithium (Li) is not 7, it is 3. There are 3 electrons in lithium.
Hey! Let me help you!
C)
<span>What
additional volume of 10.0 M HCl would be needed to exhaust the
remaining capacity of the buffer after the reaction described in Part B?
In other words, how much more of this HCl solution is required to
consume the remaining Tris in the buffer?
let x = how much more solution needed
x = 1.8 mL <=========
Your answer is 1.8 mL as it is needed for more of this HCI solution is requires to consume the remaining Tris in the buffer!
Have an awesome day! :D
</span>