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kari74 [83]
3 years ago
12

Can someone help me with these. I don’t understand how to answer them or do the work

Chemistry
1 answer:
ICE Princess25 [194]3 years ago
6 0
How am I supposed to help you if there's not picture of what the problem is
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A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing point depression o
Ludmilka [50]

Answer:

0.297 °C

Step-by-step explanation:

The formula for the <em>freezing point depression </em>ΔT_f is

ΔT_f = iK_f·b

i is the van’t Hoff factor: the number of moles of particles you get from a solute.

For glucose,

       glucose(s) ⟶ glucose(aq)

1 mole glucose ⟶ 1 mol particles     i = 1

Data:

Mass of glucose = 10.20 g

  Mass of water = 355 g

                 ΔT_f = 1.86 °C·kg·mol⁻¹

Calculations:

(a) <em>Moles of glucose </em>

n = 10.20 g × (1 mol/180.16 g)

  = 0.056 62 mol

(b) <em>Kilograms of water </em>

m = 355 g × (1 kg/1000 g)

   = 0.355 kg

(c) <em>Molal concentration </em>

b = moles of solute/kilograms of solvent

  = 0.056 62 mol/0.355 kg

  = 0.1595 mol·kg⁻¹

(d) <em>Freezing point depression </em>

ΔT_f = 1 × 1.86 × 0.1595

        = 0.297 °C

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3 years ago
(6.21×10^3)(0.1050) <br><br>(Scientific Notation)
mel-nik [20]
6.21 x 10^3 = (Move decimal point 3 spaces to the right)

6210

6210 (0.1050)

652.05
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Recycling aluminum cans and taking shorter showers are two ways to practice the blank of natural resources
enyata [817]
Conservation, because you are conserving natural resources(water) and reusing aluminum cans which help the environment. Hope this helps!
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Maize, man, Goat, is an example of a food chain<br>true or false​
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Answer:

False

Explanation:

The correnct chain is labeled Maize, Goat, Man.

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