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nataly862011 [7]

2 years ago

14

Sodium (Na) reacts with chlorine gas (Cl2) to form sodium chloride (NaCl) as shown in the equation 2Na+Cl-->2NaCl. If 4 moles

of sodium react, how many moles of chlorine gas will react?

1 answer:

-Dominant- [34]2 years ago

8 0

For every 2 mol of Na 1 mole of cl2 will react
4 mol Na = 2mole cl2

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Assuming complete dissociation, what is the ph of a 3.24 mg/l ba(oh)2 solution?

weqwewe [10]

We need to first find the molarity of Ba(OH₂) solution.
A mass of 3.24 mg is dissolved in 1 L solution.
Ba(OH)₂ moles dissolved - 3.24 x 10⁻³ g/171.3 g/mol = 1.90 x 10⁻⁵ mol
dissociaton of Ba(OH)₂ is as follows;
Ba(OH)₂ --> Ba²⁺ + 2OH⁻
1 mol of Ba(OH)₂ dissociates to form 2OH⁻ ions.
Therefore [OH⁻] = (1.90 x 10⁻⁵)x2 = 3.8 x 10⁻⁵ M
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3 years ago

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2 years ago

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8 0

3 years ago

What is the mole fraction of sodium chloride in solution that is 13. 0 y mass sodium chloride and that has a density of 1. 10 g/

lyudmila [28]

Mole fraction is the ratio of the constituent moles to the total constituents. The mole fraction of sodium chloride is 0.0443.

<h3>What is a mole fraction?</h3>

A mole fraction is the proportion of the moles of the component in a total component present.

In 100 gm of solution 13.0 5 means, there is 13.0 gm of sodium chloride present. The mass of water is calculated as,

100 - 13.0 = 87.0 gm

Moles of sodium chloride is calculated as:

$\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass} \\\\&= \dfrac{13}{58}\\\\&= 0.224 \;\rm moles\end{aligned}$

Moles of water are calculated as:

$\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass} \\\\&= \dfrac{87}{18}\\\\&= 4.83\;\rm moles\end{aligned}$

Now, moles fraction is calculated by dividing moles of sodium chloride by total moles as,

$\begin{aligned} \text{Mole fraction of NaCl} &= \dfrac{0.224}{0.224 + 4.83}\\\\&= 0.0443\end{aligned}$

Therefore, the mole fraction of sodium chloride is 0.0443.

Learn more about mole fraction here:

brainly.com/question/8076655

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7 0

1 year ago

What is the formal charge of carbon in CO?<br><br>|C≡O|

Anastasy [175]

Answer:

FC of C = -1

General Formulas and Concepts:

Lewis Dot Structures
Resonance Structures
Formal Charge: FC = # of valence e⁻ - # of lone e⁻ - # of bonds

Explanation:

<u>Step 1: Define</u>

Carbon (C)

4 valence e⁻
2 lone e⁻
3 bonds

Oxygen (O)

6 valence e⁻
2 lone e⁻
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<u>Step 2: FC of C</u>

Substitute: FC = 4e⁻ - 2e⁻ - 3
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2 years ago