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3 years ago

Describe the motion of the tiny particles that make up matter.

Chemistry

1 answer:

sergij07 [2.7K]3 years ago

8 0

Matter is made out of molecules and atoms

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Calculate the number of moles and the mass of the solute in each of the following solutions:(a) 2.00 L of 18.5 M H2SO4, concentr

Vlad [161]

Explanation:

$c=\frac{n}{V}$

c = Concentration of the solution

n = Moles of compound in solution

V = Volume of the solution

a) 2.00 L of 18.5 M of concentrated sulfuric acid.

n= ? c = 18.5 M, V = 2.00 L

$18.5 M=\frac{n}{2.00 L}$

n = 37 moles of sulfuric acid

b) 100.0 mL of $3.8\times 10^{-5} M$ of sodium cyanide

n= ? ,c = $3.8\times 10^{-5} M$ , V = 100.0 mL = 0.1 L

$3.8\times 10^{-5} M=\frac{n}{0.1 L}$

n = $3.8\times 10^{-6} moles$ of sodium cyanide

c) 5.50 L of 13.3 M of concentrated formaldehyde.

n= ? c = 13.3 M, V = 5.50 L

$13.3 M=\frac{n}{5.50 L}$

n = 73.15 moles of formaldehyde.

d)325 mL of $1.8\times 10^{-6} M$ of iron sulphate

n= ? ,c = $1.8\times 10^{-6} M$ , V = 325 mL = 0.325 L

$1.8\times 10^{-6} M=\frac{n}{0.325 L}$

n = $5.85\times 10^{-7} moles$ of iron sulfate.

5 0

3 years ago

what is the molarity of a solution prepared by dissolving 20.0 g of NaOH in enough water to make 0.50 L og solution?

Alona [7]

Answer:

Molarity of a solution = 1 mol / L

Explanation:

Given:

Amount of NaOH =20 g

Amount of water = 0.50 l

Find:

Molarity of a solution

Computation:

1 mol of NaOH = 40 g

So,

Moles of NaOH = 20 / 40 g = 0.50 mol NaOH

Molarity of a solution = moles of solute / Liters of solution

Molarity of a solution = 0.50 / 0.50

Molarity of a solution = 1 mol / L

6 0

3 years ago

(5.625 + 8.15) x 2.34 + 3.2

dalvyx [7]

The answer is 35.4335

Hope this helped! (Plz mark me brainliest!)

3 0

3 years ago

Read 2 more answers

Please help me on this!!

Fudgin [204]

Answer:

Explanation:

7 0

3 years ago

Which statement is true of magnets

Harrizon [31]

The statement that is true about magnets is ''Similar poles of a magnet repel each other.''

<h3>What are the characteristics of magnet?</h3>

All magnets have both north and south poles. Opposite poles attract each other, whereas the similar poles repel each other. When you rub a piece of iron along a magnet, this force creates a magnetic field.

So we can conclude that The statement that is true about magnets is ''Similar poles of a magnet repel each other.''

Learn more about magnet here: brainly.com/question/14997726

#SPJ1

4 0

2 years ago