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AleksandrR [38]
3 years ago
12

11

Chemistry
1 answer:
Rama09 [41]3 years ago
3 0

Answer:  0.695 mol/L

Explanation:

To find the final concentration of the solution, we must first identify the moles of the solute (NaNO₃):

   moles = mass ÷ molar mass

∴ moles of NaNO₃ = 325 g ÷ 84.995 g/mol

                              =  3.824 mol

Now, since the final volume is 5.5 L and this volume contains the 3.824 moles of NaNO₃,

then the molarity of the solution = 3.824 mol ÷ 5.5 L

                                                     =  0.695 mol/L

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4 years ago
A chemist prepares a solution of zinc nitrate Zn(NO3)2 by measuring out 78.3g of zinc nitrate into a 350ml volumetric flask and
Anvisha [2.4K]

Answer:

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Explanation:

Moles is denoted by given mass divided by the molecular mass ,

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n = \frac{w}{n}

n = moles ,

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m = molecular mass .

From the information of the question ,

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MOLARITY  -

Molarity of a substance , is the number of moles present in a liter of solution .

M=\frac{n}{V}

M = molarity ( unit = mol / L or M )

V = volume of solution in liter ( unit = L ),  

n = moles of solute ( unit = mol ),

From the question ,.

V = 350 mL

Since , 1 mL = 10⁻³ L

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Molarity can be calculated as  -

M=\frac{n}{V}

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6 0
3 years ago
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