How would you prepare 3.5 L of a 0.9M solution of KCl?

Answers

Answer 1

Answer: Calculate the mass of the solute in the solution :

Molar mass KCl = 74.55 g/mol

m = Molarity * molar mass * volume

m = 0.9 * 74.55 * 3.5

m = 234.8325 g

To prepare 0.9 M KCl solution, weigh 234.8325 g of salt in an analytical balance, dissolve in a beaker, shortly after transfer with the help of a funnel of transfer to a volumetric flask of 100 cm³ and complete with water up to the mark, then cover the balloon and finally shake the solution to mix

hope this helps!

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A student requires 2.00 L of 0.100 M NH4NO3 from a 1.75 M NH4NO3 stock solution. What is the correct way to get the solution?

Answers

To solve this we use the equation,

M1V1 = M2V2

where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.

1.75 M x V1 = 0.100 M x 2.0 L

V1 = -.11 L

Answer : The volume of $NH_4NO_3$ stock solution is, 0.114 L

Solution :

According to the dilution law,

$M_1V_1=M_2V_2$

where,

$M_1$ = molarity of $NH_4NO_3$ solution = 0.100 M

$V_1$ = volume of $NH_4NO_3$ solution = 2.00 L

$M_2$ = molarity of $NH_4NO_3$ stock solution = 1.75 M

$V_2$ = volume of $NH_4NO_3$ stock solution = ?

Now put all the given values in the above law, we get the volume of $NH_4NO_3$ stock solution.

$(0.100M)* (2.00L)=(1.75M)* V_2$

$V_2=0.114L$

Therefore, the volume of $NH_4NO_3$ stock solution is, 0.114 L

Josh prepares a solution by mixing sodium nitrate with water. To calculate the molarity of the solution, josh should calculate the moles of which substance,and why?

Answers

There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. Josh should calculate the moles of the sodium nitrate by dividing the mass with the molar mass of sodium nitrate. This is because it is the solute in this problem.

Answer:

the answer is sodium nitrate because it is solute

Explanation

thats what is correct I assure you.

Which substance is a binary acid

Answers

It is knownthat acids compounds contains hydrogen and produces hydrogen ion in water. A binaryacid however is an acid that have two elements, one of the element has ahydrogen attached to it. Examples of binary acids are hydrogen fluoride (HF),hydrogen bromide (HBr) and hydrogen sulfide (H2S). In naming a binary acid, ithas two rules; one, as pure compounds and two, as acid solutions. For purecompounds, start with the name ‘hydrogen’ and end the anion name with ‘-ide’. Foracidic compounds, start with ‘hydro-‘, end the anion with ‘-ic’ and add ‘acid’.

Nuclei with ______ numbers of neutrons and protons are more stable.

Answers

Nuclei with the same number of neutrons and protons are more stable

Select the THREE answers that are correct concerning a saturated solution of PbCl2. PbCl2(s) Pb+2(aq) + 2Cl-(aq)

Answers

Answer:

a b d

Explanation:

Gold and helium are examples of a(n)

Answers

Gold and helium are the example of element.

What is element?

A material is considered an element if it could not be divided into smaller parts by whatever non-nuclear chemical reaction.

What is gold?

Gold is a kind of element which has atomic number 79 and can be represented by Au.

A soft, golden metal, gold is. Gold was incredibly malleable as well as ductile, along with all other metals. Gold also has a good ability to conduct heat as well as electricity.

To know more about element and gold.

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gold and helium are examples of elements

Other Questions

The equation below shows lithium reacting with nitrogen to produce lithium nitride. 6Li + N2 2Li3N If 12 mol of lithium were reacted with excess nitrogen gas, how many moles of lithium nitride would be produced?

Name two metals that do not always lose the same number of electrons

Dtermine the volume in liters occupied by 0.030 miles of a gas at stp

Which is a substance that is made up of only one type of atom? compound element solution mixture