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3 years ago

What is the molairity of a solution that consiste of 4.5 mols of a soluter in a 500 ml solution? Show your work.

Chemistry

2 answers:

cupoosta [38]3 years ago

8 0

the other ans is perfect in explanation the steps to calculate...

BUT theres a single math mistake:

4.5mol/0.5L = 9M n not 0.9M

so 9M is the correct ans

RideAnS [48]3 years ago

3 0

Answer:

0.9 mol/L.

Explanation:

Molarity is defined as the number of moles of solute in a 1.0 L of the solution.

It can be expressed as: M = n / V(L)

M is the molarity of the solution (mol/L),

n is the number of moles of solute (n = 4.5 moles),

V is the volume of the solution (V = 500 ml = 0.5 L).

∴ The molarity of the solution (M) = n / V = (4.5 mol) / (0.5 L) = 0.9 mol/L.

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3 years ago

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Read 2 more answers

Which of the following elements has the highest electronegativity?

olga55 [171]

Bromine has the highest

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3 years ago

I really need help pls, will pay anything

Triss [41]

Explanation:

For the first part,

Reaction equation:

N₂ + 3H₂ → 2NH₃

Given:

Number of moles of NH₃ = 6 moles

Unknown:

Number of moles of N₂ = ?

Solution:

N₂ + 3H₂ → 2NH₃;

From the reaction above, we solve from the known specie to the unknown. Ensure that the equation is balanced;

2 moles of NH₃ is produced from 1 mole of N₂

6 moles of NH₃ will be produced from $\frac{6}{2}$ mole of N₂

= 3moles of N₂

The number of moles of N₂ is 3 moles

ii.

Given parameters:

Number of moles of sulfur = 2.4moles

Molar mass of sulfur = 32.07g/mol

Unknown:

Mass of sulfur = ?

Solution:

The number of moles of any substance can be found using the expression below;

Number of moles = $\frac{mass}{molar mass}$

Mass of sulfur = number of moles of sulfur x molar mass

Insert the parameters and solve;

Mass of sulfur = 2.4 x 32.07 = 76.97g

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3 years ago