What is the change in the freezing point of a solution made by dissolving 14.7 g of C6H1206 into 150 ml of water? Answer in 2 decimal.
The density of water is 1.00 g/ml and and Kf = 1.86 °C/m

The change in freezing point is 1.02°C

The change in the freezing point (ΔTf) is calculated from the following equation:

ΔTf = i x Kf x m

Given:

i = 1 (Van't Hoff factor, is equal to 1 because the solute is a nonelectrolyte)

Kf = 1.86°C/m (Freezing point constant of the solvent)

m = molality

We have to calculate the molality (m), which is equal to the moles of solute in 1 kg of solvent:

m = moles solute/ kg solvent

The solute is C₆H₁₂O₆. Thus, we calculate the moles of solute by dividing the mass into its molecular weight (Mw):

Mw(C₆H₁₂O) = (12 g/mol C x 6) + ( 1 g/mol H x 12) + (16 g/mol O x 6) = 180 g/mol

moles solute = mass C₆H₁₂O/Mw(C₆H₁₂O) = 14.7 g/(180 g/mol) = 0.082 mol

The solvent is water. Its mass (in kg) is obtained from the volume and the density, as follows:

kg solvent = V x density = 150 mL x 1.00 g/mL x 1 kg/1000 g = 0.15 kg

Now, we calculate the molality (m):

m = moles of solute/kg solvent = 0.082 mol/(0.15 kg) = 0.546 m

Finally, we calculate the change in freezing point:

ΔTf = i x Kf x m = 1 x 1.86°C/m x 0.546 m = 1.02°C

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there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.