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3 years ago

6

Answer the following questions about the last lesson below. What did we figure out about chain reactions? What did we figure out

about fission? Fission produce more energy than a typical fuel sources, chain reaction

1 answer:

PIT_PIT [208]3 years ago

8 0

Answer:

(Nothing)-But No answer

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One office building contains only incandescent lights. The building next door contains only fluorescent lights. Predict which bu

denpristay [2]

The building with incandescent light bulbs would have higher energy bills because less than 10% of the bulb is used for light while the rest is given off as heat. Fluorescent light bulbs use ¼ as much energy and provide the same amount of light.

7 0

3 years ago

WILL GIVE BRAINLIEST!!!!!!!!!!!<br><br><br>What are 4 examples of physical properties?<br>

marissa [1.9K]

List of 11 properties.

Hope it helps

5 0

3 years ago

Calculate the % dissociation of 0.10 M solution of acetic acid (pKa = 4.75)

madreJ [45]

Given :

Molarity of acetic acid solution, M = 0.10 M.

pKa of acetic acid, pKa = 4.75 .

To Find :

Percentage dissociation of 0.10 M solution of acetic acid.

Solution :

We know, $pK_a = -log\ K_a$

Taking antilog both side, we get :

$K_a = 1.78\times 10^{-5}$

Since, acetic acid has 1 hydrogen atom to loose , so it is a monoprotic acid.

Now, percentage dissociation of monoprotic acid is given by :

$\alpha = \sqrt{\dfrac{K_a}{C}}\\\\\alpha =\sqrt{ \dfrac{1.78\times 10^{-5}}{0.1}}\\\\\alpha = 0.0133\times 100 = 1.33 \%$

Hence, this is the required solution.

3 0

3 years ago

Alenkasestr [34]

Answer:

Mass of carbon dioxide = 7.48 g

Explanation:

Given data:

Mass of lithium carbonate = 12.5 g

Mass of carbon dioxide produced = ?

Solution:

Chemical equation:

Li₂CO₃ → Li₂O + CO₂

Number of moles of Li₂CO₃:

Number of moles = mass/ molar mass

Number of moles = 12.5 g /73.89 g/mol

Number of moles = 0.17 mol

Now we will compare the moles of Li₂CO₃ with CO₂.

Li₂CO₃ : CO₂

1 : 1

0.17 : 0.17

Mass of carbon dioxide:

Mass of carbon dioxide = number of moles × molar mass

Mass of carbon dioxide = 0.17 mol × 44 g/mol

Mass of carbon dioxide = 7.48 g

4 0

3 years ago

The monomer of poly(vinyl chloride) has the formula C2H3Cl. If there are 1,565 repeat units in a single chain of the polymer, wh

monitta

Answer:

$\large \boxed{9.780 \times 10^{4}\text{ u}}$

Explanation:

The molecular mass of a monomer unit is:

C₂H₃Cl = 2×12.01 + 3×1.008 + 35.45 = 24.02 + 3.024 + 35.45 = 62.494 u

For 1565 units,

$\text{Molecular mass} = \text{1565 units} \times \dfrac{\text{62.494 u}}{\text{1 unit }} = \mathbf{9.780 \times 10^{4}}\textbf{ u}\\\\\text{The molecular mass of the chain is $\large \boxed{\mathbf{9.780 \times 10^{4}}\textbf{ u}}$}$

8 0

3 years ago