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Nutka1998 [239]
3 years ago
5

What is the molarity of 125 ml of solution containing 5.31 g sodium nitrate​

Chemistry
1 answer:
quester [9]3 years ago
8 0
<h3>Answer:</h3>

0.5 moles/L or 0.5 M

<h3>Explanation:</h3>
  • Molarity is the concentration of a solution in moles per liter.
  • It is calculated by;

Molarity = Number of moles ÷ Volume

In this case;

Volume = 125 mL

Mass of sodium nitrate = 5.31 g

We are required to calculate the molarity of sodium nitrate

<h3>Step 1: Calculate the number of moles of sodium nitrate </h3>

Moles = Mass ÷ Molar mass

Molar mass of sodium nitrate = 84.9947 g/mol

Therefore,

Moles of NaNO₃ = 5.31 g ÷ 84.9947 g/mol

                            = 0.0625 moles

<h3>Step 2: Molarity of sodium nitrate </h3>

Remember;

Molarity = Moles ÷ Volume

Volume of NaNO₃ = 0.125 L

Therefore;

Molarity = 0.0625 moles ÷ 0.125 L

            = 0.5 Moles/L or 0.5 M

Thus; the concentration of sodium nitrate is 0.5M

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6. 10 electrons

7. 32 electrons

8. 36 electrons

Explanation:

4. Principal and Azimuthal (subsidiary) quantum number because in 4d, 4 represent principal quantum number and d- represents azimuthal quantum number (having l- value as 3)

5.Principal, Azimuthal (subsidiary), and magnetic quantum number are the first three because 2 stands for principal, s-for azimuthal (l=0) and magnetic quantum number for s- orbital= 0

6. 10 electrons, because for sublevel with l= 3, is a d-sub-level, and d- can take 10-electrons

7. 32 electrons, using the relationship 2×n^2 for the maximum number of electrons in a shell,

,n= 4 , hence 2×4^2= 32

8. 36 electrons, because n=4 and n= 3 can have the maximum configuration of [Ar]4s^2 3d^10 4p^6

This will sum up to 36- electrons, since Argon has 18 -electrons.

18+2+10+6=36 electrons

8 0
3 years ago
The periodic table of elements is organized by the number of what?
DENIUS [597]
Protons, it was once organized by atomic mass but organizing by protons turned out to be better
5 0
3 years ago
A. How many protons, electrons, and neutrons make up an atom
mestny [16]

Answer:

45 neutrons

Explanation:

Bromine has 35 protons and a mass number of 80. a) How many neutrons does the atom of bromine have? The mass number = protons + neutrons. Bromine has a mass number of 80 and 35 protons so 80-35 = 45 neutrons.

5 0
2 years ago
How many chlorine (CI) atoms are in Methylene?​
Aleks04 [339]

Answer:

None

Explanation:

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6 0
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Read 2 more answers
How many molecules of propane were in the erlenmeyer flask? Avogadro's number is 6. 022 × 10^23 molecules/mol
Ede4ka [16]

3.74×10^{21}

3.74 ×10^{21} molecules of propane were in the erlenmeyer flask.

number of moles of propane can be calculated as moles of propane.

mass of propane =  0.274 g

molar mass of propane = 44.1

So this gives us the value of 6.21×10^{-3} moles of propane

No one mole of propane As a 6.0-2 × 10^{23}

so, 6.21 ×10^{-3} × 6. 022 × 10^23

= 3.74 ×10^{21}

Therefore, molecules of propane were in the erlenmeyer flask is found to be 3.74 ×10^{21}

<h3>What is erlenmeyer flask?</h3>
  • A laboratory flask with a flat bottom, a conical body, and a cylindrical neck is known as an Erlenmeyer flask, sometimes known as a conical flask or a titration flask.
  • It bears the name Emil Erlenmeyer after the German chemist.

<h3>What purpose does an Erlenmeyer flask serve?</h3>
  • Liquids are contained in Erlenmeyer flasks, which are also used for mixing, heating, chilling, incubating, filtering, storing, and other liquid-handling procedures.
  • For titrations and boiling liquids, their sloped sides and small necks make it possible to whirl the contents without worrying about spills.

To learn more about calculating total molecules visit:

brainly.com/question/8933381

#SPJ4

4 0
2 years ago
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