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ruslelena [56]
3 years ago
9

What is the molarity of a 2.0 L sodium hydroxide solution containing 10.0 grams of solute?

Chemistry
1 answer:
Lady bird [3.3K]3 years ago
8 0

Answer:

0.125 M

Explanation:

Molarity or concentration is given by;

= Moles/volume in litres

But; moles = mass/Relative formula mass

                  = 10.0/40.0

                  = 0.25 Moles

Molarity = 0.25 moles/2.0 L

             <u> = 0.125 M</u>

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What is the PH of a 1.3×(10)^-9 M HBr solution?
olga nikolaevna [1]

pH solution = 8.89

<h3>Further explanation</h3>

Given

The concentration of HBr solution = 1.3 x 10⁻⁹ M

Required

the pH

Solution

HBr = strong acid

General formula for strong acid :

[H⁺]= a . M

a = amount of H⁺

M = molarity of solution

HBr⇒H⁺ + Br⁻⇒ amount of H⁺ = 1 so a=1

Input the value :

[H⁺] = 1 x  1.3 x 10⁻⁹

[H⁺] = 1.3 x 10⁻⁹

pH = - log [H⁺]

pH = 9 - log 1.3

pH = 8.89

7 0
2 years ago
Which of the following best explains why the two values in Parts A and B are different? The perceived forces between chlorine ga
BartSMP [9]

Answer:

The high system pressure and relatively large chlorine molecule size.

Explanation:

Having the expression of the ideal gas, and clearing the pressure, we have:

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In this equation, high pressures and low temperatures have an influence on nonideal gases.

Therefore, at high pressures, the molecules in a gas are closer together and have high intermolecular forces. On the other hand, at low temperatures, the kinetic energy of a gas is reduced, so that the intermolecular attractive forces are also reduced.

6 0
2 years ago
Read 2 more answers
(e)
mars1129 [50]

Answer:36g

Explanation:6.8:3.6=68:x

x=68*3.6/6.8=36

5 0
3 years ago
A property is a characteristic that can be used to identify a substance. Properties can be ______ or _______.
kirill [66]

Answer:

a list of characteristics that can be used to identify a substance include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.

3 0
3 years ago
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sulfur (s) is in group 16 of the periodic table. how many valence electrons dos an atom of sulfur have?
Alex73 [517]
6 because the number of valence electrons is always the ones-place of any two-digit group number. So an element in group 18 would have 8 valence electrons
Hope this helps!
3 0
3 years ago
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