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3 years ago

Chemistry Question!! Please help, I'm stupid...

1 answer:

4 0

First, let's calculate the concentration by gram per liter:
C = $\frac{19.3}{0.25}$ = 77.2 g/L

Now, let's convert it to molarity, knowing that the molar mass of sodium chloride is 58.5g/mol:
Molarity = $\frac{77.2}{58.5}$ = 1.31 M

For more explanation:
molarity = $\frac{gram}{Liter}$ * $\frac{Mol}{gram}$ = $\frac{mol}{Liter}$

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Question number 10 & 11, answer please and thank you

nika2105 [10]

Answer:

molarity = moles of solution/liters of solution

molarity = 1 mole/2 liters

molarity = 0.5 M

molarity = 50 moles/200 kg

molarity = 0.25 M

Explanation:

3 0

4 years ago

If nitrogen and hydrogen combine in a synthesis reaction, what would the product of the reaction be? n2 + 3h2 → 3

Fed [463]

N2 + 3H2 ---> 2NH3
nitrogen + hydrogen ---> ammonia

4 0

3 years ago

Read 2 more answers

The Lanthanides are often be found below the Periodic Table so it will fit nicely on a textbook page. If they were inserted into

Annette [7]

Answer:

period 6

Explanation:

If the lanthanides were inserted into the periodic table, they would go into periodic 6.

Their atomic number is between 57 - 71 from element lanthanum to lutetium.

The elements in this period are 15 in number.
They are also know as elements in the f-block.

The elements that makes up the series are:

Lanthanum

Cerium

Praseodymium

Neodymium

Promethium

Samarium

Europium

Gadolinium

Terbium

Dysprosium

Holmium

Erbium

Thulium

Ytterbium

Lutetium

6 0

3 years ago

What is the chemical name for the balanced equation? 2Al+3Pb(NO3)2=2Al(NO3)3+3Pb

Zigmanuir [339]

The chemical name for reactant side:

Al - Aluminium, Pb(NO3)2 - Lead(II) nitrate.

The chemical name for product side:

Al(NO3)3 - Aluminium nitrate, Pb - lead.

<u>Explanation</u>:

This is an oxidation-reduction (redox) reaction:

3 $Pb^{II}$ + 6 e- → 3 $Pb^{o}$ (reduction)

2 $Al^{o}$ - 6 e- → 2 $Al^{III}$ (oxidation)

Pb(NO3)2 is an oxidizing agent, Al is a reducing agent.

Reactants:

Al uminium

Names: Aluminum, Aluminium powder, Al

Appearance: Silvery-white-to-grey powder, Silvery-white,

malleable, ductile, odorless metal.

Pb(NO3)2 – Lead(II) nitrate

Other names: Lead nitrate, Plumbous nitrate, Lead dinitrate

Appearance: White colorless crystals, White or colorless crystals

Products:

Al(NO3)3 – Aluminium nitrate

Other names: Nitric Aluminum salt, Aluminum nitrate,

Aluminium(III) nitrate

Appearance: White crystals, solid | hygroscopic

Pb - lead

Names: Lead, Lead metal, Plumbum

Appearance: Bluish-white or silvery-grey solid in various forms.

Turns tarnished on exposure to air. A heavy, ductile,

soft, gray solid.

8 0

4 years ago

HeLpPp asap I’ll mark you as brainlister

jeka57 [31]

It’s 1 or 3 sorry if this is wrong

8 0

3 years ago