100.0 mL of a 0.500 M solution of KBr is diluted to 500.0 mL. What is the new concentration of the solution

Answers

Answer 1

Answer:

0.1 M

Explanation:

The following data were obtained from the question:

Initial volume (V1) = 100 mL

Initial concentration (C1) = 0.5 M

Final volume (V2) = 500 mL

Final concentration (C2) =?

Using the dilution formula C1V1 = C2V2, the new concentration of the solution can be obtained as follow:

C1V1 = C2V2

0.5 × 100 = C2 × 500

50 = C2 × 500

Divide both side by 500

C2 = 50/500

C2 = 0.1 M

Therefore, the new concentration of the solution is 0.1 M

Answer 2

The new concentration of the solution of KBr that was diluted to 500mL is 0.1M

HOW TO CALCULATE CONCENTRATION:

The concentration of solution that was diluted can be calculated using the formula as follows:

C1V1 = C2V2

Where:

C1 = original concentration (M)C2 = diluted concentration (M)V1 = original volume (mL)V2 = diluted volume (mL)

According to this question, 100.0 mL of a 0.500 M solution of KBr is diluted to 500.0 mL. The new concentration can be calculated as follows:

0.500 × 100 = C2 × 500

50 = 500C2

C2 = 50 ÷ 500

C2 = 0.1M

Therefore, the new concentration of the solution of KBr that was diluted to 500mL is 0.1M.

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Related Questions

You have an atom with a mass number of 100 with 85 neutrons. What is this
element?

Answers

Answer:

phosphorus i believe

Explanation:

in order to find the atomic number you minus the mass number from number of neutrons then just look it up in a periodic table

The mass number of the atom is 100 and number of neutrons is 85. Then, number of protons is 15. Then, element with 15 protons and 15 electrons is phosphorous.

What is mass number ?

An atom is composed of subatomic particles electrons, protons and neutrons. Protons and neutrons are located inside the nucleus. The mass number of an atom is sum of number of protons and neutrons.

The number of electrons in an atom in its neutral state is called its atomic number. In a neutral atom, the number of electrons and proton are the same.

Give the mass number = 100

no.of neutrons = 85

no.of protons = 100 -85 =15

no.of electron = 15

Thus, atomic number = 15.

The element with atomic number of 15 is phosphorous (P).

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Is it possible to produce a blood type AB from blood type A and B

Answers

Answer:

Yes, it is possible to produce a blood type AB from blood type A and B.

Explanation:

If we were to do a hybrid cross and the mother's blood type was A, then her genotypes would be AA and AO. Additionally, if the father had type B blood, his genotypes would be BB and BO. From this, we can tell that the child's genotypes would have to be A, AB, B, O. Since AB is one of the choices, yes, it is possible to produce a blood type AB from blood type A and B.

The only times where you won't be able to produce a child with type AB is if both of the parents have type B blood and type O blood. Or if one parent has type B blood and the another has type O blood. Or if one parent has type AB and the other one has O blood. Or if both parents have type A blood.

The absolute temperature of a fixed mass of ideal gas is tripled while its volume remains constant. The ratio of the final pressure of the gas to its initial pressure is

Answers

Answer:

3 : 1

Explanation:

The following data were obtained from the question:

Initial temperature (T₁) = T

Initial pressure (P₁) = P

Final temperature (T₂) = 3T

Final pressure (P₂) =..?

Since the volume is constant, we shall use the following formula P₁ /T₁ = P₂ /T₂ to obtain the final pressure. This is illustrated below:

P₁ /T₁ = P₂ /T₂

P/T = P₂ /3T

Cross multiply

T × P₂ = P × 3T

Divide both side by T

P₂ = P × 3T /T

P₂ = P × 3

P₂ = 3P

Therefore, the final pressure is tripled.

Finally, we shall determine the ratio of the final pressure to the initial pressure as follow:

Initial pressure (P₁) = P

Final pressure (P₂) = 3P

Final pressure (P₂) : Initial pressure (P₁)

P₂ : P₁ => 3P/P

P₂ : P₁ => 3 : 1

Therefore, the ratio of the final pressure to the initial pressure is 3 : 1

Choose the answer that shows the following number correctly
written in scientific notation.
430,000
a 4.3 x 104
b 43 x 104
C 0.43 x 106
d 4.3 x 105

Answers

D) 4.3 x 10^5 is the answer

Brainliest?

You have a piece of gold jewelry weighing 9.35g. Its volume is 0.654cm 3 . Assume the metal is an alloy of gold and silver, which have densities of 19.3g/cm 3 and 10.5g/cm 3 , respectively. Also assume that there is no change in volume when the pure metals are mixed. Calculate the percentage of gold (by mass) in the alloy.

Answers

Answer:

57.54% is the percentage of gold by mass in the alloy.

Explanation:

The mass of the mixture is 9.35g. That is:

9.35g = Mass Gold + Mass Silver

Mass silver = 9.35g - Mass gold (1)

Now, the volume of the jewelry is the sum of volumes of gold and silver:

0.654cm³ = Mass Gold / 19.5g/cm³ + Mass silver / 10.5g/cm³ (2)

Volume = Mass / Density.

Replacing (1) in (2):

0.654cm³ = Mass Gold / 19.5g/cm³ + (9.35g - Mass gold) / 10.5g/cm³

0.654 = 0.051282 Mass Gold + 0.890476 - 0.095238 Mass gold

-0.236476 = -0.043956 Mass gold

Mass gold = 5.38g

And mass percent of gold in the alloy is:

5.38g / 9.35g * 100 =

57.54%

The nutrition label on rice lists the amounts of proteins, carbohydrates, and fats in one serving. These substances are important for human nutrition. How are proteins, carbohydrates, and fats related to the discipline of chemistry?

Answers

Answer:All are chemical compounds.

How are the Celsius, Kelvin, and Fahrenheit scales similar? How are they different?

Answers

celcius and Fahrenheit are the same at -40 degrees since the scales converge . celcius and Kelvin become Equal at high temperatures as the difference. of 273. 15 between them gets lost in the noise . 0 degree Celsius is Equal to 32degrees Fahrenheit.

Given sulfur has an electron configuration of 1s22s22p63s23p4, what oxidation numbers would you expect for sulfur? (Hint: Think about how to achieve a full outer shell.)

Answers

Explanation:

1s2 2s2 2p6 3s2 3p4

Oxidation number refers to the number of electrons that an atom gains or loses as it forms a chemical bond with another element.

From the electronic configuration above, it is expected that sulphur has oxidation number of 2. This is because the p orbital can hold a maximum of 6 electrons. However, in the electronic configuration it is just holding 4. To complete it, it needs to gain 2 more electrons.

Answer:

+4, +6, –2

Explanation:

What are the boiling points and freezing points (in oC)of a solution of 50.3 g of I2in 350 g of chloroform? The kb= 3.63 oC/m, the kf= 4.70 oC/m for CHCl3, and the molar mass of I2is 253.8 g/mol. The normal boiling point for CHCl3is 61.2 oC, and the normal freezing point for CHCl3is -63.5 oC.

Answers

Answer:

F.p   ≈  - 66.16⁰c

B.p  ≈ 59.1⁰c

Explanation:

Normal boiling point = 61.2⁰c

Normal freezing point = -63.5⁰c

Kb = 3.63⁰⁰ c/m

Kf = 4.70⁰ c/m

molar mass = 253.8 g/mol

solvent = 350 g = 0.35 kg

calculate The new freezing point and Boiling point

First we have to find the molality = number of moles / solvent in kg

= 0.198 / 0.35 = 0.5657 M

Hence the new freezing point can be calculated as

Normal freezing temp -  new freezing temp = Kf * molality

= -63.5 - F.p = 4.7 * 0.5657

F.p = -63.5 - 2.6588 ≈  - 66.16⁰c

Boiling point

Normal boiling point - new boiling point = Kb * molality

= 61.2 - B.p = 3.63 * 0.5657

B.p = 61.2 - 2.0535 ≈ 59.1⁰c

If the chemical reaction AB + CD ⟶ AD + BC releases heat, what is true of the stored bond energy of the reactants and products? The bonds do not have energy, the atoms release heat. The bond energy of the reactants is the same as the bond energy of the products. The bond energy of the reactants is lower than the bond energy of the products. The bond energy of the reactants is higher than the bond energy of the products.

Answers

Answer:

The correct option is the last option

Explanation:

The chemical reaction provided in the question is a double-displacement reaction which is an exothermic reaction (which is the reason for the release of heat). An example of a double displacement reaction and exothermic reaction is the neutralization reaction illustrated below.

HCl + NaOH ⇒ NaCl + H₂O

From the law of conservation of energy, energy can neither be created nor destroyed, hence the total energy in a given system should ordinarily be the same (in the reactants and products), however when energy is released in a reaction (as in the case with an exothermic reaction), it shows there are more bond energy in the reactants than in the products and it is the excess energy that is been released into the atmosphere.


List all the different ways we can use a model to represent things

Answers

Modeling for chemistry is periodic table of elements during high school

what is zirconium electron configuration

Answers

kr,5s2,4d2

Explanation:

as itis in the 2nd transition series

An unknown substance from planet X has a density of 10 g/ml. It occupies a volume of 80 ml. What is the mass of this unknown substance? *

Answers

Answer:

The answer is

800 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

density = 10 g/ml

volume = 80 ml

The mass of the substance is

mass = 10 × 80

We have the final answer as

800 g

Hope this helps you

if volume stays the same, what happens to pressure?

Answers

Answer:

Pressure will stay the same if volume stays the same.

Answer:

Volume is inversely proportional to pressure, meaning if one goes up the other goes down and vise-versa. With volume remaining the same and there are no other given factors, pressure also remains the same

Which of the following pairs of elements are most likely to form an ionic bond?


A- Br and Ca

B- Br and N

C- Ca and Mg

D- Ca and Fe

Answers

Answer:

Ionic bonds ussally form with a metal, and a non metel elements, so the answer would most likley be B.

Explanation:

hope I could help

(7.31 x 10+4 g) + (3.2300 x 10+3 g) =

Calculator answer

Final answer

Answers

7g + 105.4

this is the question simplified correctly

In an atom of an element there are a fixed number of electrons. If the total mass of electrons in 1 mole (6.022 x 1023) of atoms of a certain element is 18.65 mg, how many protons must there be in the nucleus of that atom? (mass of electron = 9.109 x 10–28 g).

Answers

Answer:

No. of protons = 34

Explanation:

First we need to calculate the number of electrons in one mole of the the element:

No. of electrons per mole = Total Mass of Electrons/Mass of 1 Electron

No. of electrons per mole = (18.65 x 10⁻³ g)/(9.109 x 10⁻²⁸ g)

No. of electrons per mole = 2.04 x 10²⁵ electrons/mol

Now, we calculate the no. of electrons in 1 atom:

No. of electrons per atom = No. of Electrons per mole/No. of atoms per mole

No. of electrons per atom = (2.04 x 10²⁵ electrons/mol)/(6.022 x 10²³ atoms/mol)

No. of electrons per atom = 34 electrons/atom

Since, the no. of protons in a pure element are equal to the number of electrons. Therefore,

No. of protons = 34

In this exercise we have to use the knowledge of atoms to calculate the number of protons, in this way we find:

Protons will be  34

First we need to reckon the number of electrons fashionable individual blemish of the the place where one feels comfortable:

[tex]electrons \ per \ mole = Total\ Mass\ of \ Electrons/Mass\ of\ 1 \ Electron\\ electrons\ per\ mole = (18.65 * 10^{-3} g)/(9.109 * 10^{28} g)\\ electrons \ per \ mole = 2.04 x 10^{25} electrons/mol[/tex]

Now, we plan on the electrons in 1 smallest part of something:

[tex]electrons\ per\ atom = Electrons\ per\ mole/atoms\ per\ mole\\ electrons\ per\ atom = (2.04 * 10^{25} electrons/mol)/(6.022 * 10^{23} atoms/mol)\\ electrons\ per\ atom = 34 electrons/atom [/tex]

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which alkene represents the correct starting material phg?

Answers

Explanation:

The pH is larger than 7.

The relationship between pH and pOH is

pH + pOH = 14

if something is base, it's pH is greater than 7.

it's pOH is between 0 and 7.

Solute and solvent in pasta

Answers

Answer:

It depends on what kind of pasta it is

What are the properties of baking powder, baking soda, corn starch, gelatin, and salt?

Answers

Answer:

heeeee pues hola no se chao

Answer:

B. salt

-

I know that you answered this question like a month ago, but im going to answer anyway for the people who is having a hard time answering this :D

Calculate the atomic mass of element "X" if it has 2 naturally occurring isotopes with the following masses and natural abundances. X−107 106.90509 amu 51.84%X−109 108.90476 amu 48.46%

Answers

Answer:

Using my (not very precise) periodic table, I get the mass of Ag as 107.87

Explanation:

This must be a combination of these two isotopes. So the % of the other isotope must be 48.16%.

To work with these percentages in an equation I'll use them as decimals.

So now I can start putting them into an equation:

107.87  =  ( 106.905 ⋅ 0.5184 )  +  ( x ⋅ 0.4816 )  

Because both of the isotope masses, multiplied by their percentage, would give us the overall average mass.

107.87  =  55.419552  ⋅  (  x  ⋅  0.4816 )  

Worked out the brackets that we can work out, and then rearrange to give:

107.87  −  55.419552  =  (  x  ⋅  0.4816  )

Again rearrange:

52.450448 =  (  x  ⋅  0.4816  )  

And final rearranging:

x  =  52.450448  - 0.4816

x

=

108.909

(using same sig figs as given in question)

You probably want to work through that again using your periodic table value for Ag.

List the types of electromagnetic radiation in order of increasing frequency.

Answers

Answer:

In order of increasing frequency and decreasing wavelength these are: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays........... ᕕ( ᐛ )ᕗ

..

Which lists the waves in order of frequency, from highest to lowest?
O X-rays, gamma rays ultraviolet
O radio waves, visible light, X-rays
O ultraviolet, microwaves, gamma rays
O visible light, infrared, microwaves

Answers

Visible light, infrared, microwaves. This is the waves in order of frequency, from highest to lowest. Therefore, the correct option is option D.

What is electromagnetic wave?

One of the various ways that energy moves through space is electromagnetic radiation. Electromagnetic radiation includes the heat from a blazing fire, the sun's light, the X-rays your doctor uses, and the energy used it to cook food inside a microwave. Although though these energies may appear to be very different from each other, they are connected by the fact that they all have characteristics of waves.

The amplitude of a wave is the vertical line between both the tip of the crest and the wave's axis. This is the characteristic linked to the wave's brightness or intensity. The wavelength of a wave is the horizontal separation of two succeeding crests or troughs. Visible light, infrared, microwaves. This is the waves in order of frequency, from highest to lowest.

Therefore, the correct option is option D.

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what is the volume occupied by 6.022 X 1​0*23molecules of any gas at STP.

Answers

1 mole of compound contains numbers of molecule
Step 1:- one mole of a compound occupies 22.4L of volume. Which means the number of molecules occupy 22.4 L of volume

{22.4L}

how do you calculate the number of neutrons in atom

Answers

Answer:

Yes, it is standard for each element. You can calculate it from the formula: n=A-Z, where n is the number of neutrons, A is the atomic mass and Z is the atomic number.

An example of an extensive physical property is
Group of answer choices

mass

density

boiling point

melting point

Answers

Answer:

boiling point

3. The 2 in 1s2 represents the number of
located in that energy level.
Answers:
electrons
protons

Answers

Answer:

electrons

Explanation:

In an atom, you can have varying numbers of electrons, depending on if its an ion or not.  You can use the orbitals to see the energy level of the atom.

An atom has only one number of protons.  The number of protons cannot vary.

Which of the following is an example of a chemical change
A. apple slices turn brown
B. toast burns
C. silver tarnishes
D. all of these are chernical changes​

Answers

Answer:

D. all of these are chemical changes

Lead (Pb) (average atomic mass 207.19 amu) has three naturally-occurring isotopes, Pb206, Pb207and Pb208 with isotopic masses of 205.98 amu, 206.98 amu and 207.98 amu respectively. If the isotopes Pb207and Pb208 are present in equal amounts, calculate the percent abundance of each isotope of Pb, which are, Pb206, Pb207 and Pb208.​

Answers

Answer:

pb am 207.19 amu

pb206, pb207and pb208

what is the strength of alloys and what is the solubility of alloys please answer this simple question within 12 hours will mark brainliest for sure

Answers

Answer:Features very high tensile strength and toughness. Titanium alloys are light in weight, have superior corrosion resistance properties and can withstand extreme temperatures. ... Titanium alloys are heat-treated to increase their strength in terms of fracture toughness, fatigue strength and high temperature strength.35 grams is the sollubility.

Explanation:

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