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lozanna [386]
3 years ago
15

QUESTION 13

Chemistry
1 answer:
Tom [10]3 years ago
3 0

Answer:

b. 101.02°C

Explanation:

The elevation of boiling point in a solvent due the addition of a solute is a colligative property called <em>Boiling point Elevation. </em>The formula is:

ΔT = Kb*m*i

<em>Where ΔT is change in boiling point</em>

<em>Kb is boilinig point elevation constant = 0.512°C/m for water</em>

<em>m is molality of the solution = 0.50m</em>

<em>And i is Van't Hoff Factor (4 for the Al(NO₃)₃ because its disolution produce 4 ions)</em>

<em />

Replacing:

ΔT = 0.512°C/m*0.50m*4

ΔT = 1.02°C

As the boiling point of pure water is 100°C and the increasing is of 1.02°C, boiling point of the solution is:

101.02°C

Right option is:

<h3>b. 101.02°C</h3>

<em />

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Answer:

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Explanation:

The mass of a proton is 1.673 × 10-24 g. The mass of a neutron is 1.675 × 10-24 g. The mass of the nucleus of an 56Fe atom is 9.289 × 10-23 g. What is the nuclear binding energy (in J) for 56Fe? (c = 3.00 × 108 m/s)

some of the theoretical mass will be converted to binding energy

by Einstein's famous relativity equation

E = mc^2

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its theoretical nuclear mass is

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92.289 X 10^-24 g

the mas defect is the theoretical mass minus the actual

1.459 X 10^-24 gm =^

1.459 X 10^-27 Kgm

c = 3.00 X 10* m/s=

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<h3>Answer:</h3>

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<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
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