Refer to the graph below. In order to have a saturated solution, how many grams of potassium nitrate, KNO3, need to be dissolved in 100 grams of water
at 20°C. Select the closest measurement. A.60 B.100 C.30 D.20

Answer:

2.109 atm

Explanation:

This is Gay-Lussac's Law when the temperature of a sample of gas in a rigid container is increased, the pressure of the gas increases as well. The increase in kinetic energy results in the molecules of gas striking the walls of the container with more force, resulting in a greater pressure. Gay-Lussac's Law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas, when the volume is kept constant. Gay-Lussac's Law is very similar to Charles's Law, with the only difference being the type of container.

So for this one:

[tex]\frac{P_{1} }{T_{1}} =\frac{P_{2} }{T_{2}}[/tex]

Rearrange it to

P2= (P1 x T2)/T1

P2= (450 x 1.5)/320 = 2.109 atm

Answer:

[tex]3.9*10^4 J[/tex]

Explanation:

Answer:

[tex]\boxed {\boxed {\sf 39, 225 \ Joules}}}[/tex]

Explanation:

Since we are given the mass, temperature, and specific heat, we should use the following formula to calculate heat energy.

[tex]q=mc \Delta T[/tex]

We have 375 grams of water, the specific heat of water is 4.184 J/g ° C, and the temperature is raised 25 degrees Celsisus. Therefore:

Substitute the values into the formula.

[tex]q= (375 \ g)(4.184 \ J/g \textdegree C)(25 \textdegree C)[/tex]

Multiply the first two values together. The units of grams will cancel.

[tex]q=1569 \ J/ \textdegree C(25 \textdegree C)[/tex]

Multiply again. This time, the degrees Celsius cancel, so we are left with only the units of Joules.

[tex]q= 39225 \ J[/tex]

39,255 Joules of heat must be absorbed by the water.

Answer:

1) PV > nRT, because the real volume of the gas would be more than the ideal

volume.

Explanation:

According to the ideal gas equation; PV = nRT.  Let us recall that this equation only holds under ideal conditions.

Gases exhibit ideal behavior under high temperature and low pressure. At higher pressure, the real volume of the gas is larger than the ideal volume of the gas.

Thus, at high pressure,  PV > nRT, because the real volume of the gas would be more than the ideal  volume.

Answer:

1) PV > nRT, because the real volume of the gas would be more than the ideal volume.

Explanation:

just took the test :)

Answer:

(C) NO2 has covalent bonds.

Answer:

64.7g

Explanation:

The balanced chemical equation of this question is as follows;

AlI + HgCl2 → HgI + AlCl2

Based on the above equation, 1 mole of AlI (aluminum monoiodide) reacts to produce 1 mole of HgI (mercury iodide).

Using mole = mass/molar mass to convert mass of HgI to moles.

Molar mass of HgI = 200.59 + 127

= 327.59g/mol

Mole = 138/327.59

= 0.42mol

- If 1 mole of AlI (aluminum monoiodide) reacts to produce 1 mole of HgI (mercury iodide)

- Then 0.42 mol of HgI will be produced by 0.42mol of AlI.

Using mole = mass/molar mass

Mass = mole × molar mass

Molar mass of AlI = 27 + 127

= 154g/mol

Mass of AlI = 0.42 × 154

= 64.7g of AlI

Answer:

The concentration is 2.277

Explanation:

The formula for finding the concentration of a solution is C= mole of solute divided by the volume of the solution

Therefore, C= 2.05/0.900

C=2.277

Answer:

Metamorphic

Explanation:

Answer: thats metamorphic rock

Answer:

No, your missing some bonds

Answer:

5.72 × 10⁻³¹ m

Explanation:

Step 1: Given and required data

Step 2: Calculate the longest wavelength of light (λ) with energy sufficient to break this bond

We will use the Planck-Einstein relation.

E = h × c/λ

λ = h × c/E

λ = (6.63 × 10⁻³⁴ J.s) × (3.00 × 10⁸ m/s)/(348 × 10³ J) = 5.72 × 10⁻³¹ m

Answer:

P(C₆H₆) = 0.2961 atm

Explanation:

I found an exercise pretty similar to this, so i'm gonna use the data of this exercise to show you how to do it, and then, replace your data in the procedure so you can have an accurate result:

"At a certain temperature the vapor pressure of pure benzene (C6H6) is measured to be 0.63 atm. Suppose a solution is prepared by mixing 79.2 g of benzene and 115. g of heptane (C7H16) Calculate the partial pressure of benzene vapor above this solution. Round your answer to 2 significant digits. Note for advanced students: you may assume the solution is ideal".

Now, according to the data, we want partial pressure of benzene, so we need to use Raoul's law which is:

P = Xₐ * P°    (1)

Where:

P: Partial pressure

Xₐ: molar fraction

P°: Vapour pressure

We only have the vapour pressure of benzene in the mixture. We need to determine the molar fraction first. To do this, we need the moles of each compound in the mixture.

To get the moles:   n = m / MM

To get the molar mass of benzene (C₆H₆) and heptane (C₇H₁₆), we need the atomic weights of Carbon and hydrogen, which are 12 g/mol and 1 g/mol:

MM(C₆H₆) = (12*6) + (6*1) = 78 g/mol

MM(C₇H₁₆) = (7*12) + (16*1) = 100 g/mol

Let's determine the moles of each compound:

moles (C₆H₆) = 79.2 / 78 = 1.02 moles

moles (C₇H₁₆) = 115 / 100 = 1.15 moles

moles in solution = 1.02 + 1.15 = 2.17 moles

To get the molar fractions, we use the following expression:

Xₐ = moles(C₆H₆) / moles in solution

Xₐ = 1.02 / 2.17 = 0.47

Finally, the partial pressure is:

P(C₆H₆) = 0.47 * 0.63

Hope this helps

Answer:

See answer below

Explanation:

The picture below will show you the final product and mechanism.

In the first step, the NaNH₂ is a strong base, so, this base will substract the hydrogen from carbon 2, to generate a negative charge there, and then, carbon 2 becomes a nucleophyle.

As a nucleophyle it will attack to the CH₃I in the next step, and it will attach to the CH₃.

The second step is just a regular step to reduce the triple bond of the alkyne to alkane or alkene, this will depend on the quantity of the reactant. In this case, an alkene.

Hope this helps,,,,,,k

Check G the answer is up theree

Answer:

See Explanation

Explanation:

The ionic compounds are; MnSO4 and LiF

The covalent compounds are; CH3NH2, PCl5 and O2

1) The formulas of the ions are;

MnSO4  - Mn^2+ SO4^2-

LiF - Li^+ F^-

The structure of each of the three covalent molecules is shown in the images attached to this answer.

2) CH3NH2 - Has a tetrahedral molecular geometry and electronic geometry

PCl5 - Has a trigonal bipyramidal molecular geometry and electronic geometry

O2 - Has a linear molecular geometry and electronic geometry.

3) CH3NH2  is sp3 hybridized

PCl5 is sp3d hybridized

O2 - is sp2 hybridized

4) MnSO4  - Manganese  II sulphate

PCl5 - Phosphorus pentachloride

O2 - Oxygen molecule

LiF- Lithium fluoride

5) PCl5 - Five sigma bonds and no pi bond

CH3NH2 - 6 sigma bonds and no pi bond

O2 - 1 sigma bond and 1 pi bond

Answer: It depends equilibrium constant K

Explanation:   You need to to have reaction formula.

If K >> 1 then concentrations of products are much bigger than

concentrations of reactants. If K < < 1, concentration of products is small.

Answer:

3)The rate of the forward reaction is equal to the rate of the reverse reaction

Answer:

The Rate of Forward Reaction is equal to the rate of the reverse reaction.

Explanation:

Hope this helps :)

Answer:

1 is 84

2 is 218

3 is 84

4 is 84

5 is 134

Answer:

Ofc D. bc if the temp decreases, that means it is getting colder u dummy! But if it increases, it is getting warmer.

Explanation:

I got it right on USATestprep for using common sense, mark me the brainliest.

Answer:

A

Explanation:

Reactants are on the right side of the chemical reaction

Answer:

meteor

Explanation:

The most logical identification of a "shooting star" is a meteor. A meteor is basically any material from outerspace that falls to Earth. The main characteristic of a meteor is that from our point of view on the surface of the Earth it looks like a shooting star because we see a streak of light behind it. This light is simply dust and rock from the meteor burning up as it enters the Earth's atmosphere, leaving a "tail" of light behind it. Which to us looks like a shooting star.

Unlike homogeneous solutions, the particles in a colloid are Visible, and will pass through a semi-permeable membrane. The correct options are A. and A.

Colloidal particles are the small and minute particles that are present in the solid. Their size is from 10 nano microns to greater than 10 microns. They are visible through a membrane.

There are four types of colloidal particles that are: sol, emulsion, foam, and aerosol. These particles are solid particles and examples are milk, mayonnaise, butter, etc.

The passing through and the visibility of the colloidal particles depends on the size of the pores. If the pore size is bigger it may not transfer, but if the size is small they can transfer through the membrane.

Thus, the correct option are A. Visible, and A. Will pass.

To learn more about colloidal particles, refer to the link:

https://brainly.com/question/11640006

#SPJ2

The question is incomplete. Your most probably complete question is given below:

A. Visible,

B. Invisible

A. Will pass

B. Will not pass

We are given:

251 mL sample of 0.45M HCl added to 455 mL distilled water

Whack a mole! (finding the number of moles):

We know that in order to find molarity, we use the formula:

Molarity = number of moles / Volume (in L)

so, number of moles is:

Number of moles = Molarity * Volume(in L)

now let's plug the values for the HCl solution to find the number of moles

Number of moles = 0.45M * 0.251 L

Number of moles = 0.113 moles

Time to concentrate (finding the final concentration):

Total final volume = 251 mL + 455 mL = 706 mL = 0.706 L

Number of moles of HCl = 0.113 moles

Molarity = Number of moles / Volume (in L)

Molarity = 0.113 / 0.706

Molarity = 0.16 M

___________________________________________________________

BONUS METHOD TIME!!!

We know the relation:

M1 * V1 = M2 * V2

where M1 and M2 are the initial and final molarities and V1 and V2 are initial and final volumes respectively

notice that I didn't mention that the volume has to be in Liters, that's because of the units being concerned with both sides of the equation, say I have the volume in mL and want to convert both these volumes to L, I would divide both sides by 1000, which would NOT change the overall value

Now, plugging values in this equation

(0.45) * (251) = (251 + 455)* (M2)

112.95 = (706)(M2)

M2 = 112.97/706                                [dividing both sides by 706]

M2 = 0.16 Molar

Answer: There are [tex]0.617 \times 10^{4}[/tex] moles present in [tex]3.72 \times 10^{27}[/tex] atoms of iron.

Explanation:

According to the mole concept, there are [tex]6.022 \times 10^{23}[/tex] atoms present in one mole of a substance.

Hence, moles present in [tex]3.72 \times 10^{27}[/tex] atoms are calculated as follows.

[tex]Moles = \frac{3.72 \times 10^{27}}{6.022 \times 10^{23}}\\= 0.617 \times 10^{4} mol[/tex]

Thus, we can conclude that there are [tex]0.617 \times 10^{4}[/tex] moles present in [tex]3.72 \times 10^{27}[/tex] atoms of iron.

I think it's sodium hydroxide

Explanation:

sodium hydroxide is a base

Answer:

they're all fake

Explanation:

Answer:

h2

Explanation:

Molarity : It is defined as the number of moles of solute present in one liter of solution.

Therefore, the molarity of solution is 3.33

A.  1.9 M

B.  0.0033 M

C.  1,875 M

D.  0.30 M

E. 3.3 M