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user100 [1]
3 years ago
12

g Which of the following solutes in aqueous solution would be expected to exhibit the smallest freezing-point lowering (assuming

ideal behavior)? In other words, which one would have the highest freezing point temperature? A) 0.20 m CaCl2 B) 0.50 m C2H5OH (ethanol) C) 0.10 m Al(NO3)3 D) 0.25 m NH4Br E) 0.30 m NaCl
Chemistry
1 answer:
Lady_Fox [76]3 years ago
8 0

Answer:

0.10 m Al(NO3)3

Explanation:

Let us note that the substance that has the highest freezing point will have the lowest freezing point depression. Since;

ΔTf = Kf m i

ΔTf  = freezing point depression

Kf = freezing point constant

m = molality

i = Van't Hoft factor

Given that the freezing point depression depends on the molality and the Van't Hoft factor (number of particles), we can see that 0.10 m Al(NO3)3 has the least freezing point depression and highest freezing point temperature because it gives the least value of m * i. That is 0.10 m * 4 = 0.4

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All questions attatched :)
eimsori [14]

54. fluorine

55. oxygen

56. they have the same number of protons

57. nucleus 3

Explanation:

54. The element represented by the nucleus 1 have 9 protons and 9 neutrons. The atomic number of the element is equal to the number of protons = 9, so the element is fluorine.

55. The element represented by the nucleus 2 have 8 protons and 10 neutrons. The atomic number of the element is equal to the number of protons = 8, so the element is oxygen.

56. nucleus 2 contains 8 protons and 10 neutrons

nucleus 4 contains 8 protons and 11 neutrons.

The atoms that have the same number of protons but different number of neutrons are called isotopes.

57. nucleus 3 have 10 protons and 10 neutrons and correspond to neon. Neon have 10 electrons (equal to the number of protons) and have the electronic configuration 1s² 2s² 2p⁸. Because all the electrons shells are filled with electrons, neon have a stable electron configuration.

Learn more about:

subatomic particles

brainly.com/question/4800027

#learnwithBrainly

6 0
3 years ago
The density of osmium, which is the densest metal, is 22.57 g/cm^3. What is the mass of a block of osmium that measures 1.00 cm
olganol [36]
Density = Mass / Volume
V = 1.00 * 4.00 * 2.50 = 10 cm³
22.57 g/cm³ = Mass / 10 cm³
M = 22.57 g/cm³ * 10 cm³
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Answer: The mass of the block of osmium is 225.7 g.
7 0
3 years ago
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