what is the molarity of a concentrated hbr solution if the solution is 27.7% hbr by mass and has a density of 1.24 g/ml

Answers

Answer 1

Answer: The final answer is 4.246 Molar. For a given volume of the solution, let's say 100mL, the following calculations can be made:

Given:
Molar Mass HBr = 80.904g/mol
Density solution = 1.24 g/mL
27.7%(wt/wt) HBr

Total mass of solution = volume(density) = 100mL (1.24 g/mL) = 124 g solution

Mass HBr in solution = 124g(0.277) = 34.348 g HBr

Moles HBr in solution = 34.348/80.904 = 0.4246 moles HBr

Molarity = moles solute/L solution = 0.4246 moles HBr/0.1 L solution
Molarity = 4.246 M

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Gross Domestic Product includes consumption, net exports, _____, and _____. investments, government expenses intermediate goods, services last year's products, this year's products

Answers

Answer: The correct answer for the blank is-

Investments and government expenses.

Gross domestic product (GDP) is the total goods and services value, which is produced within the boundary of a country during a particular year.

GDP is measured by expenditure method, which includes investment, government expenditure, net exports (Exports-Imports), and consumption.

Thus, investments and government expenses is the right answer for the blanks.

Answer:

A) investments, government expenses

Explanation:

I got it right on Odyssey!

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.

Calculate the amount of energy released in the formation of one mole of BaSe bonds (not lattice energy). The radius of the barium ion is 1.35 Å, and the radius of the selenide ion is 1.98 Å. Note that 1Å=10−10m.

Answers

The correct answer for the question that is being presented above is this one: "2.02x10^3 kJ/mol." Calculate the amount of energy released in the formation of one mole of BaSe bonds (not lattice energy). The radius of the barium ion is 1.35 Å, and the radius of the selenide ion is 1.98 Å. Note that 1Å=10−10m.

Final answer:

The lattice energy in the formation of one mole of BaSe bonds can be calculated using the equation Ulattice = (k * e2) / r, where k is the proportionality constant, e is the charge of the ions, and r is the distance between the ions. Given the radius of the barium ion and selenide ion, we can calculate the distance between them and then use it in the equation to find the lattice energy. The lattice energy in this case is approximately 10.8 billion N.

Explanation:

The amount of energy released in the formation of one mole of BaSe bonds can be calculated using the concept of lattice energy. Lattice energy is the energy released when ions come together to form a solid lattice structure. In this case, we have a barium ion (Ba2+) and a selenide ion (Se2-) coming together to form BaSe bonds.

To calculate the lattice energy, we can use the equation:

Ulattice = (k * e2) / r

Where:

Ulattice is the lattice energy
k is the proportionality constant (8.99 * 109 Nm2/C2)
e is the charge of the ions (2 for Ba2+ and 2 for Se2-)
r is the distance between the ions (which can be calculated using the sum of their radii)

Given that the radius of the barium ion is 1.35 Å and the radius of the selenide ion is 1.98 Å, we can calculate the distance between them and then use that value in the equation to find the lattice energy.

Let's calculate it:

Distance between ions = radius of Ba ion + radius of Se ion

= 1.35 Å + 1.98 Å

= 3.33 Å

Converting to meters:

= 3.33 * 10-10 m

Now, substituting the values in the equation:

Ulattice = (8.99 * 109 Nm2/C2) * (2 * 2) / (3.33 * 10-10 m)

= 10791849712.91 N

Therefore, the amount of energy released in the formation of one mole of BaSe bonds (lattice energy) is approximately 10.8 billion N.

Learn more about Calculating lattice energy here:

brainly.com/question/34679410

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what is the concentration, in percent (v/v), of a solution containing 50 mL of diethyl ether (C4H10O) in 2.5 L of solution?

Answers

Answer: The v/v in percent of diethyl ether in a solution is 2%.

Explanation:

To calculate the percentage volume by volume of a solute in a solution, we use the formula:

$\%(v/v)=\frac{\text{Volume of solute (in mL)}}{\text{Volume of solution (in mL)}}* 100$

We are given:

Volume of solute = 50 mL

Volume of solution = 2.5 L = 2500 mL (Conversion factor: 1 L = 1000 mL)

Putting values in above equation, we get:

$\%(v/v)=(50mL)/(2500mL)* 100=2\%$

Hence, the v/v in percent of diethyl ether in a solution is 2%.

Volume of solute = 50 mL

Volume of solution = 2.5 L x 1000 = 2500 mL

( V / V ) = ( 50 / 2500 ) x 100

( V/ V) =0.02 x 100 = 2.0 %

hope this helps!

Write the atomic symbols for isotopes with the following characteristics? 1)an oxygen atom with 10 neutrons 2)a neon atom with twelve neutrons 3)25 electrons and 28 neutrons 4)a mass number of 24 and 13 neutrons 5)a titanium atom with 25 neutrons

Answers

Isotopes are elements that differ in the number in neutrons while the numner of protons are the same. The answers of the questions are: 1) 18/8 O 2) 22/10 Ne 3) 53/25 Mn 4) 37/24 Cr 5) 106/81 Ti.

Which is NOT an element that must be present for a fire to occur?a. heat
c. hydrogen
b. fuel
d. oxygen