For this, we use equations from the colligative properties of solutions specifically boiling point elevation and freezing point depression. The equations for these are expressed as:
ΔTb = kb m
where k is a boiling point elevation constant and m is the concentration in terms of molality
ΔTf = kf m
where k is a freezing point elevation <span>constant and m is the concentration in terms of molality
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We use both expression to solve for the freezing point. For this case, concentration is the same. The equation will then be:
ΔTf = kf ( ΔTb / kb )
0-Tf = 1.86 (103.7 - 100 / 0.512 )
Tf = -13.4°C
11 with pemdas, you have to multiply all by 3
Answer
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Explanation:
Cellulosic ethanol is ethanol (ethyl alcohol) produced from cellulose (the stringy fiber of a plant) rather than from the plant's seeds or fruit. It can be produced from grasses, wood, algae, or other plants. It is generally discussed for use as a biofuel.
Answer:
0.5 atm.
Explanation:
- Henry’s law states that the amount of a gas dissolved in a solution is directly proportional to the pressure of the gas above the solution
- We should use Henry’s law: <em>P = KC,</em>
where, P is the partial pressure of the gaseous solute above the solution.
k is a constant.
C is the concentration of the dissolved gas.
<em>At two different pressures:</em>
<em>P₁C₂ = P₂C₁,</em>
P₁ = 2.5 atm, C₁ = 5.0 g/L.
P₂ = ??? atm, C₂ = 1.0 g/L.
<em>∴ P₂ = P₁C₂/C₁</em> = (2.5 atm)(1.0 g/L)/(5.0 g/L) = <em>0.5 atm.</em>
