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3 years ago

HELP!!! PLEASE!!!

1 answer:

8 0

<span>Molarity is expressed as the number of moles of solute per volume of the solution. We solve the problem above as follows:

0.1000 mol Mg(NO3)2 / L (.1 L) ( </span><span>148.3 g / mol ) = 1.483 g Mg(NO3)2

</span>0.1000 mol Sr(NO3)2 / L (.1 L) ( 211.63 g / mol ) = 2.116 g Sr(NO3)2

Hope this answers the question. Have a nice day.

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How many moles of NaOH are required to prepare 2.90 L of 1.8 M NaOH?

marusya05 [52]

V=2.90 L
c=1.8 mol/L

n(NaOH)=vc

n(NaOH)=2.90L*1.8mol/L=5.22 mol

3 0

3 years ago

Read 2 more answers

How many grams of C8H18<br> is in 405,576.398 mL

nevsk [136]

$Molarity X \frac{0.762 mol}{05.576398 L} = Mass$ is the of $C_8H_1_8$ is in 405,576.398 mL.

<h3>What is molarity?</h3>

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.

Given data:

Molar mass of $C_8H_1_8$ = 0.762 mol

Volume of solution = 405,576.398 mL = 405,576.398 mL/1000 = 405.576398 L

Solution:

Step 1: Calculating moles of $C_8H_1_8$

• Molarity = $\frac{\;Moles \;of \;solute}{\;Volume \;of \;solution \;in \;litre}$

• Putting the value in the given formula

• Moles of solute C8H18 = $\frac{\;Mass}{\;Molar \;molar \;mass}$

• Moles of solute C8H18 = $\frac{\;Mass}{0.762 mol}$

Now,

Molarity = $\frac{\;Moles \;of \;solute}{\;Volume \;of \;solution \;in \;litre}$

Molarity = $\frac{\frac{\;Mass}{0.762 mol}}{\;Volume \;of \;solution \;in \;litre}$

Molarity = $\frac{\frac{\;Mass}{0.762 mol}}{405.576398 L}$

$Molarity X \frac{0.762 mol}{05.576398 L} = Mass$

Hence, $Molarity X \frac{0.762 mol}{05.576398 L} = Mass$ is the of $C_8H_1_8$ is in 405,576.398 mL.

Learn more about molarity here:

brainly.com/question/2817451

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4 0

2 years ago

Which must you do before designing an experiment?

Vlad [161]

The answer is D. just like the other guy said...

6 0

3 years ago

Can I please get help with this question ‍♂️?

guapka [62]

Answer:

1.50 moles of POH or Potassium Hydroxide.

Explanation:

First of all, find the substance formula

The substance formula of Potassium Hydroxide is

KOH

Second of all, if you want to convert from grams to moles, you use molar mass of KOH

Third of all, find the molar mass of KOH.

K = 39.1 amu

O = 16.0 amu

H= 1.0 amu

Potassium has 1 atom, oxygen has 1 atom, and hydrogen has 1 atom.

So do this:

39.1(1) + 16.0(1) + 1.0(1) = 56.1

The molar mass of KOH is 56.1 g/mol.

Fourth of all, use dimensional analysis to show your work.

84.20 grams of KOH * 1 mol/56.1 g/mol

The moles will cancel out.

84.20 divided by 56.1 = 1.500892166

But I have to round my answer to two digits after the decimal points instead of using sig figs.

So I round to the hundredths place

1.500892166 = 1.50

So the final answer is 1.50 moles(don't forget the units) of POH.

Hope it helped!

3 0

3 years ago

Compare the electronegativity of H and O in the polar covalent bonds of a water

ExtremeBDS [4]

Answer:

The O atom will tend to attract the electrons.

Explanation:

The electronegativity of O (3.5) is much higher than H (2.1), which means it is more likely to attract electrons. The higher the electronegativity, the more attractive.

7 0

3 years ago