All categories

1 year ago

What is the number of moles in each of the following? 6 x 10^22 ions of sodium chloride

Chemistry

1 answer:

AlexFokin [52]1 year ago

7 0

Answer:

$\huge\boxed{\sf n = 0.1 \ moles}$

Explanation:

<h3><u>Given Data:</u></h3>

No. of formula units (particles) = 6 × 10²² ions

Avogadro's number = $N_A$ = 6.022 × 10²³

<h3><u>Required:</u></h3>

Number of moles = n = ?

<h3><u>Formula:</u></h3>

$\displaystyle no. \ of \ moles = \frac{no. \ of \ particles }{N_A}$

<h3><u>Solution:</u></h3>

Putting the givens

$\displaystyle n = \frac{6 \times 10^{22}}{6.022 \times 10^{23}} \\\\n = 10^{-1} \ moles\\\\\boxed{n = 0.1 \ moles}\\\\\rule[225]{225}{2}$

You might be interested in

Can someone help out pls

Troyanec [42]

Answer:

1. Acids

2. Its molecular arrangement

3. Very acidic

4. Unsaturated

5. Apple juice

Explanation:

1. Acids have pH less than 7

2. Water molecules have a polar arrangement of the oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.3. Very acidic

4. Unsaturated solutions are solutions in which the amount of dissolved solute is less than the saturation point of the solvent (at that specific temperature gradient).

5. The lower the pH, the more hydrogen molecules.

4 0

2 years ago

Read 2 more answers

a covalent bond forms a. when an element becomes a noble gas. b. when atoms share electrons. c. between metals and nonmetals. d.

marin [14]

(B)When atoms share electrons

3 0

2 years ago

i’m currently focusing on my algebra so i need a little help on a science study guide, i can’t post multiple pictures on the pag

riadik2000 [5.3K]

which question do you need help on

8 0

2 years ago

Under certain conditions Argon gas diffuses at a rate of 3.2 cm per second under the same conditions an unknown gas diffuses at

kozerog [31]

Answer:

20 g/mol

Explanation:

We can use <em>Graham’s Law of diffusion</em>:

The rate of diffusion (<em>r</em>) of a gas is inversely proportional to the square root of its molar mass (<em>M</em>).

$r = \frac{1 }{\sqrt{M}}$

If you have two gases, the ratio of their rates of diffusion is

$\frac{r_{2}}{r_{1}} = \sqrt{\frac{M_{1}}{M_{2}}}$

Squaring both sides, we get

$(\frac{r_{2}}{r_{1}})^{2} = \frac{M_{1}}{M_{2}}$

Solve for <em>M</em>₂:

$M_{2} = M_{1} \times (\frac{r_{1}}{r_{2}})^{2}$

$M_{2} = \text{39.95 g/mol} \times (\frac{\text{3.2 cm/s}}{\text{4.5 cm/s}})^{2}= \text{39.95 g/mol} \times (0.711 )^{2}$

$= \text{39.95 g/mol} \times 0.506 = \textbf{20 g/mol}$

7 0

2 years ago

Someone help it’s due today

Kitty [74]

Answer:

All elements are neutral

Explanation:

The plum pudding model of the atom indicated that all elements are neutral. The model was proposed by J.J Thomson after he conducted his experiment on the gas discharge tube.

From the experiment he discovered electrons which he called cathode rays.

Therefore, he suggested the plum pudding model of the atom.

The model describes negatively charge sphere surrounded by positive charges to balance them.

6 0

2 years ago