The molar mass of Na₂SO₄ -
2 x Na - 2 x23 = 46
1 x S - 1 x 32 = 32
4 x O - 4 x 16 = 64
total = 46 + 32 + 64 = 142 g/mol
the molarity of solution - 2.0 M
in 1 L of solution , 2.0 moles
Therefore in 2.5 L - 2 mol/L x 2.5 L = 5 mol
then the mass of Na₂SO₄ required = 142 g/mol x 5 mol = 710 g

8 0

3 years ago

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You want to mix 1 molar Nitric acid with water to dilute the nitric acid to .5 molar how should you mix these two liquids togeth

navik [9.2K]

Answer:

Freeze the water

Explanation:

5 0

3 years ago

A group of electrons is treated as a point charge of -1.12 x 10-18 C. How many electrons make up this point charge? Remember tha

Pepsi [2]

Answer:

Explanation:

Given that the total charge is given by;

C =nq

Where;

n = number of charges

q = quantity of charge

Where the total amount of charge is -1.12 x 10-18 C and the magnitude of each charge is -1.602 x 10-19 C

Then the number of electrons is obtained from;

n = -1.12 x 10-18 C/ -1.602 x 10-19 C

n = 7

4 0

3 years ago

Plz help me with this question

miskamm [114]

Answer:

<h2>Here is your answer. I hope it will help you . </h2>

5 0

3 years ago