All categories

3 years ago

Uranium mining and milling waste contains low levels of :

Chemistry

1 answer:

gavmur [86]3 years ago

5 0

Answer: D

Explanation:

Uranium ore is radioactive. That means, it spontaneously emits radiation which could have a damaging effect on the tissues of living organisms.

You might be interested in

Suppose a 500.mL flask is filled with 1.9mol of NO3 and 1.6mol of NO. The following reaction becomes possible: NO3gNOg 2NO2g The

never [62]

There is an error in the first sentence of the question; the right format is:

Suppose a 500.mL flask is filled with 1.9mol of NO3 and 1.6mol of NO2.

It should be NO2 and not NO.

Answer:

The equilibrium molarity of NO = 0.21695 m

Explanation:

Given that :

the volume = 500 mL = 0.500 m

number of moles of $NO_3 = 1.9 \ mol$

number of moles of $NO_2 = 1.6 \ mol$

Then we can calculate for their respectively concentrations as :

$[NO_3] = \frac{number \ of \ moles}{volume}$

$[NO_3] = \frac{1.9}{0.500}$

$[NO_3] = 3.8 \ M$

$[NO_2] = \frac{number \ of \ moles}{volume}$

$[NO_2] = \frac{}{} \frac{1.6}{0.500}$

$[NO_2] = 3.2 \ M$

The chemical reaction can be written as:

$NO_3_{(g)} + NO_{(g)} \to 2NO_2_{(g)}$

The ICE table is as follows;

$NO_3_{(g)} + NO_{(g)} \to 2NO_2_{(g)}$

Initial 3.8 - 3.2

Change +x x -2x

Equilibrium 3.8+x +x 3.2 - 2x

$K_c=\frac{[NO_2]^2}{[NO_3][NO]}$

$where \ K_c = 8.33$

$8.33 = \frac{(3.2-2x)^2}{(3.8+2x)x} \\ \\ 8.33 = \frac{(3.2-2x)^2}{(3.8x+2x^2)}$

$8.33(3.8x + 2x^2) = (3.2-2x)^2 \\ \\ 31.654x + 16.66x^2 = (3.2-2x)(3.2-2x) \\ \\ 31.654x + 16.66x^2 = 10.24 - 12.8x +4x^2 \\ \\ 10.24 - 44.454x -12.66 x^2 = 0 \\ \\ 12.66x^2 +44.454x -10.24 = 0$

Using quadratic formula;

$\frac{-b\pm \sqrt{(b)^2-4ac} }{2a}$

= $\frac{-(44.454) + \sqrt{(44.454)^2-4(12.66)(-10.24)} }{2(12.66)} \ \ OR \ \ \frac{-(44.454) - \sqrt{(44.454)^2-4(12.66)(-10.24)} }{2(12.66)}$

= 0.21695 OR -3.7283

Going by the positive value;

x = 0.21695

$[NO_3] = 3.8 +x = 3.8 + 0.21695$

= 4.01695 m

[NO] = x = 0.21695 m

$[NO_2] = 3.2 +x = 3.2 + 0.21695$

= 3.41695 m

3 0

3 years ago

Which of the following is considered applied research?

dexar [7]

The correct answer is option B.

Research focused on how to cure cancer is an example of applied research.

The examples of basic research are :

A.) Research focused on how the human brain works

C.) Research focused on detecting life on other planets

D.) Research focused on human behavior

Applied research targets to solve specific human problems that have commercial value in the present day. Basic research is about understanding the fundamentals of science and nature, and it is essential to laying down the foundation of applied research.

3 0

3 years ago

On Earth, the mass of one of the lunar landing modules used to explore the moon was measured to be about 4,200 kg. The accelerat

Fed [463]

7 0

4 years ago

Read 2 more answers

El sistema digestivo es un grupo de órganos que trabajan juntos para?

timama [110]

El sistema digestivo es un grupo de órganos que trabajan juntos para convertir los alimentos en energía y nutrientes básicos para alimentar a todo el cuerpo.

3 0

3 years ago

Which plant has a longer orbit. Jupiter or Saturn

romanna [79]

Answer:

Saturn

Explanation:

One whole orbit is a year on earth. Well it takes Saturn 10,759 days to make one whole orbit. It takes Jupiter 4,333 days to make a whole orbit.

7 0

3 years ago