How many chloride ions are in 0.486 moles of chloride ions?​

Answer:

To run a spectrophotometry experiment, begin by warming up the spectrophotometer and preparing the samples. Be sure to select the correct wavelength, then run a measurement on the blank solution. Follow up by running measurements on sample solutions. Once data is collected, turn off the instrument, clean the area, and discard the samples.

Explanation:

The spectrophotometer is a device used in laboratories to carry out analysis in experiments that need to measure and compare the amount of light absorbed or transmitted between samples, regardless of whether the samples are transparent or opaque solid. The spectrophotometer can be single-beam and double-beam. Regardless of the nature of the beam, to perform a spectrophotometry experiment, you must start by heating the spectrophotometer and preparing the samples. Make sure to select the correct wavelength and perform a measurement on the blank solution. Follow up by performing measurements on sample solutions. Once the data is collected, turn off the instrument, clean the area and discard the samples.

Answer:

32.062

Explanation:

The following data were obtained from the question:

Mass of isotope A (32S) = 31.97207 u

Abundance of isotope A (A%) = 95.0%

Mass of isotope B (33S) = 32.97146 u Abundance of isotope B (B%) = 0.76%

Mass of isotope C (34S) = 33.96786 u

Abundance of isotope C (C%) = 4.22%

Mass of isotope D (36S) = 35.96709 u Abundance of isotope D (D%) = 0.014%

Average atomic mass of S =..?

The average atomic mass of sulphur, S can be obtained as follow:

Average atomic mass = [(Mass of A x A%)/100] + [(Mass of B x B%)/100] + [(Mass of C x C%)/100] + [(Mass of D x D%)/100]

Average atomic mass of sulphur =

[(31.97207 x 95)/100] + [(32.97146 x 0.76)/100] + [(33.96786 x 4.22)/100] + [(35.96709 x 0.014)/100]

= 30.373 + 0.251 + 1.433 + 0.005

= 32.062

Therefore, the average atomic mass of sulphur is 32.062

Answer:

\(\% m=40.46\%\)

Explanation:

Hello there!

in this case, according to the given information, it turns out firstly necessary for us to write up the chemical equation as shown below:

\(BaCl_2+Na_2SO_4\rightarrow BaSO_4+2NaCl\)

Thus, we calculate the mass of BaCl2 stoichiometrically related to the produced 1.658 g of precipitate in order to discard it from the sample:

\(m_{BaCl_2}=1.658gBaSO_4*\frac{1molBaSO_4}{233.38 gBaSO_4} *\frac{1molBaCl_2}{1molBaSO_4}*\frac{208.23 gBaCl_2}{1molBaCl_2}\\\\m_{BaCl_2}=1.479gBaCl_2\)

Thus, the mass percentage is calculated as shown below:

\(\% m=\frac{1.479g}{3.656g}*100 \% \\\\\% m=40.46\%\)

Regards!

Scientific journals considered more reliable sources than web pages for information about science, because, they are read and openly criticized by many scientists and publish only after expert committee revision.

Scientific journals are books or magazines communicating the scientific inventions and discoveries conducted by a panel of scientists or research scholars through well designed experiments.

The communication of  results is the last step in the research methodology. It is published in a journal only after the strict revision of the results and explanations by a panel of experts. Hence, no guidelines are violated here and it is not possible to publish an erroneous result.

In the case of web pages, it can be opened or edited by many users and and not all web pages are following the guidelines of communications. Therefore, scientific journals considered more reliable sources than web pages.

Find more on scientific journals:

https://brainly.com/question/567892

#SPJ1

The executive branches of the Massachusetts state government and the United States government have some similarities, but there are also notable differences in their structures, functions, and powers.

One similarity between the Massachusetts executive branch and the US executive branch is that they are both headed by a chief executive officer. In Massachusetts, the governor is the head of the executive branch, while in the US, the President is the head of the executive branch. Both the governor and the President have the power to veto legislation, appoint officials, and manage the day-to-day operations of their respective branches.

However, there are also significant differences between the two executive branches. For example, the governor of Massachusetts has a line-item veto, which allows them to veto specific provisions in a bill without vetoing the entire bill. The President of the United States does not have this power. Additionally, the governor of Massachusetts has the power to declare a state of emergency and mobilize the National Guard to respond to disasters or civil unrest within the state, whereas the President has the power to declare a national emergency and mobilize the military in response to threats to national security.

Another difference between the two executive branches is the number of officials and agencies within them. The Massachusetts executive branch has several departments and agencies, each with their own specific responsibilities and functions. The US executive branch, on the other hand, has a much larger and more complex structure, with numerous departments, agencies, and bureaus, each with its own specific role and function.

Finally, the power and influence of the two executive branches differ significantly due to the scope and level of government they oversee. The governor of Massachusetts has authority over the state government and its citizens, while the President of the United States has authority over the federal government and its citizens, as well as significant influence over foreign affairs and international relations.

In conclusion, while the Massachusetts executive branch and the US executive branch share some similarities, there are also notable differences in their structures, functions, and powers. The Massachusetts executive branch is focused on the state government and its citizens, while the US executive branch has a broader scope and influence, including foreign affairs and national security.

Answer:

Highest occupied level of carbon is 3

Explanation:

its called Alkynes

Explanation:

The number of C atoms in 0.247 mol of C is  1.48 X 10²³ .

The number of C atoms in 1 mol of C is 6.02 X 10²³, which is also called Avogadro’s number .

so, The number of C atoms in 0.247 mol of C is _

0.247x6.02x10²³= 1.48 X 10²³.

learn more about Avogadro’s number here-

https://brainly.com/question/1513182

#SPJ9

Answer:

35 gm

Explanation:

What is mass of 0.6 mol C4H10

C4H10 has a molar nass of

(4X12) (10

X 1) = 48 + 10 8

so 1 mole of C4H10 is 58 gm

so 0.6 moles is

(0.6 X58) = 35 gm

\(\huge{\mathbb{\tt { QUESTION↓}}}\)

Which of the following is a period 4 representative element?

O A. C

O B. An

O C. Ti

O D. K

\(\huge{\mathbb{\tt {ANSWER↓}}}\)

\(\color{blue}{\tt {A.C ( Carbon )}}\)

\({\boxed{\boxed{\tt { WHAT \: IS \: CARBON?}}}}\)

#CarryOnLearning

#LetsEnjoyTheSummer

2ZnS + 3O2 → 2ZnO + 2SO2

Find the limiting reagant :

n ZnS = m ZnS / Mr ZnS

n ZnS = 11.27 / 97

n ZnS = 0.116 mole

n O2 = m O2 / Mr O2

n O2 = 6.97 / 32

n O2 = 0.218 mole

n O2 / coef. O2 > n ZnS / coef. ZnS

So ZnS is the limiting reagant

Calculate the product :

n ZnO = (coef. ZnO / coef. ZnS) • n ZnS

n ZnO = 2/2 . 0.116

n ZnO = 0.116 mole

m ZnO = n ZnO • Mr ZnO

m ZnO = 0.116 • 81

m ZnO = 9.396 gr

Answer:

Vapor pressure is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system.

Explanation:

Polar gases such as H₂O and NH3 are more likely to deviate from the ideal gas behaviours described by the kinetic molecular theory because the particles have high intermolecular forces, reducing the elasticity of their collisions.

The kinetic molecular theory is a model that describes the behaviour of gases based on the motion of their individual particles.

Intermolecular forces, such as dipole-dipole forces and hydrogen bonding, are stronger in polar gases due to their partial charges. These forces can cause the particles to attract each other, reducing the space between them and increasing their potential energy. This can lead to a decrease in the elasticity of their collisions and a deviation from the ideal gas behaviour predicted by the kinetic molecular theory.

Learn more about Polar gases here:

https://brainly.com/question/30328735

#SPJ9

Craters are produced when asteroids, meteoroids, or comets hit the moon's surface.

This refers to a type of depression which is formed on the surface of the planet, moon etc which are present in the solar system due to hyper velocity impact of a smaller body such as asteroids, meteoroids etc.

Craters can also be formed as a result of the explosion which results from the impact of the smaller bodies mentioned above. The moon has a lot of craters which was formed billions of years ago and is therefore the most appropriate choice in this scenario.

Read more about Crates here https://brainly.com/question/3440507

#SPJ1

The partial pressure of hydrogen gas in the mixture is:0.53334 atm.

What is partial pressure?
partial pressure. noun. the pressure that a gas would have if it took up the entire volume that the mixture of gases currently occupies.

P total,and the total number of moles in the mixture would be,

n total=nH2+nO2+nN2

This means that you could write

P total.V=ntotal.RT

p total=n total.RT/V

This is equivalent to

p total=[nH2+nO2+nN2].RT/V

therefore,

P total =PH2+PO2+pN2

now, to get the partial pressure of,let's Hydrogen gas

RT/V=Ptotal/nH2+nO2+nN2

therefore

PN2=XN2.p total

similarly,

PO2=XO2.p total

PN2=XN.p total

The total number of moles will be

\(ntotal\) = 0.40+0.15+0.50=1.50 moles.

\(PH2\)=0.40/1.50*2.0 atm =0.5334 atm.

\(PO2\)=0.15/1.50*2.0 atm =0.2 atm.

\(PN2\)=0.50/1.50*2.0 atm =0.66 atm.

Hence, the partial pressure of hydrogen gas in the mixture is:0.53334 atm.

To learn more about the partial pressure of H2 from the given link:
https://brainly.com/question/19813237
#SPJ9

Answer:

The given metal sample is not aluminum because its density is 3.0 g/cm³ while density of aluminum is  2.7 g/cm³.

Explanation:

Given data:

Density of aluminum = 2.7 g/cm³

Mass of metal sample = 52.0 g

Volume of metal sample = 17.1 cm³

which sample is that = ?

Solution:

The given problem will be solve through density formula.

d = m/v

d = density

m = mass

v= volume

Now we will put the values in formula.

d = 52.0 g/ 17.1 cm³

d = 3.0 g/cm³

It is given in question the density of aluminum is 2.7 g/cm³. The given metal sample is not aluminum because its density is 3.0 g/cm³.

Ratio of moles of NH₃ produced to moles of N₂ used: 2 moles of NH₃ / 1 mole of N₂

Ratio of moles of NH₃ produced to moles of H₂ used: 2 moles of NH₃ / 3 moles of H₂

From the balanced chemical equation:

N₂ + 3 H₂ ⟶ 2 NH₃

We can determine the ratio of moles of products to the moles of each reactant.

Ratio of moles of NH₃ produced to moles of N₂ used:

From the balanced equation, we can see that 1 mole of N₂ reacts to produce 2 moles of NH₃. Therefore, the ratio is:

2 moles of NH₃ / 1 mole of N₂

Ratio of moles of NH₃ produced to moles of H₂ used:

From the balanced equation, we can see that 3 moles of H₂ react to produce 2 moles of NH₃. Therefore, the ratio is:

2 moles of NH₃ / 3 moles of H₂

Learn more about the mole ratio at https://brainly.com/question/19099163

#SPJ1

Given the equation of reaction;

N₂ + 3 H₂ ---> 2 NH₃

Calculate the ratio of the moles of produced to the moles of each of the reactants used. (Write two separate ratios.)

Answer:

thermal conductors

steel

polystyrene

thermal insulator

between things of the same temp?

sorry to ask but if its ok with you, may i get brainly, i need to rank up all i need is two more, if not its fine. thank you and yours truly golden

Answer:i try and try but nobody likes me

Explanation: that's the story of the day lucky person brainiest pls

hehehhehehhehehehehehhehhehehehehehehehehehehe

A cell is the structural and fundamental unit of life. The study of cells from its basic structure to the functions of every cell organelle is called Cell Biology. Robert Hooke was the first Biologist who discovered cells

two types of cell

1) Prokaryotes

2) Eukaryotes

Characteristics of Cells

1) Cells provide structure and support to the body of an organism.

2) The cell interior is organised into different individual organelles surrounded by a separate membrane.

3) The nucleus (major organelle) holds genetic information necessary for reproduction and cell growth

\(hope \: its \: helpful \: to \: you \: please \: mark \: me \: a \: brainliest\)

A cell is defined as the fundamental, structural and functional unit of all life.

have a great day

God bless you

Answer:

C Group 11

Explanation:

Group 11, by modern IUPAC numbering, is a group of chemical elements in the periodic table, consisting of copper (Cu), silver (Ag), and gold (Au).

These elements show highest electrical conductivity.

Answer:

C Group 11

Explanation:

Group 11, by modern IUPAC numbering, is a group of chemical elements in the periodic table, consisting of copper (Cu), silver (Ag), and gold (Au).

These elements show highest electrical conductivity.

Explanation:

The final volume of the ladybug's prison is approximately 0.4 liters.

To determine the final volume of the ladybug's prison, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature. The equation for Boyle's Law is:

P1 * V1 = P2 * V2

Where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume, respectively.

In this scenario, the initial volume (V1) is given as 0.5 L, and the initial pressure (P1) is 1 atm. The final pressure (P2) is 1.25 atm. We need to find the final volume (V2).

Plugging the given values into the equation, we have:

1 atm * 0.5 L = 1.25 atm * V2

Simplifying the equation, we find:

0.5 L = 1.25 atm * V2

Dividing both sides of the equation by 1.25 atm, we get:

0.5 L / 1.25 atm = V2

V2 ≈ 0.4 L

For such more questions on volume

https://brainly.com/question/31454001

#SPJ8

Answer:

See the answer below

Explanation:

The correct answer would be that the solute particles lower the solvent's vapor pressure, thus requiring a higher temperature to cause boiling.

Dissolving a solute particle in a solvent leads to a decrease in the vapor pressure of the solvent above the resulting solution when compared to the pure solvent. The lower the vapor pressure of a liquid, the higher the temperature required for the liquid to boil and vice versa. Hence, a higher temperature would be needed to boil a solvent with dissolved solutes.

Answer:

0.430 Litre

Explanation:

The first thing that you need to do here is to convert the mass of lithium bromide to moles by using the compound's molar mass.\(100g \frac{1 moleNaCl}{58.5g} = 1.71 moles of NaCl\)

Now, the molarity of the solution is simply a measure of the number of moles of solute, which in your case is NaCl, present for every 1.00 L of the solution.

In order to have a 4.00-M solution of NaCl, you need to have 4.00 moles of NaCl for every 1.00 L of this solution.

You know that your sample contains 1.71 moles of NaCl, so you can use the molarity of the solution as a conversion factor to determine how many liters of this solution can be made.

\(1.71 mole NaCl \frac{ 1 L Solution}{4 mole NaCl} = 0.43 L solution\).

Answer:

2 pair of an electron

Explanation:

carbon having 6 valence electron 2 electron involved in covalent bonding so 4 electron means 2 pairs of an electron will left.

The standard reduction potential of the Cr³+/Cr electrode is -0.46V. None of the option is correct.

To determine the standard reduction potential of the Cr³+/Cr electrode, we can use the Nernst equation, which relates the standard reduction potential to the cell potential under non-standard conditions. The Nernst equation is given by:

E = E° - (0.0592/n) * log(Q)

where E is the cell potential, E° is the standard reduction potential, n is the number of electrons transferred in the half-reaction, and Q is the reaction quotient.

In this case, we have the standard potential of the cell as −0.60V. We know that the standard reduction potential of the Sn/Sn²+ electrode is -0.14V. Therefore, the reduction potential of the Cr³+/Cr electrode can be calculated as:

E = -0.60V - (-0.14V)

E = -0.60V + 0.14V

E = -0.46V

Therefore, the standard reduction potential of the Cr³+/Cr electrode is -0.46V.

For more such question on standard reduction potential visit;

https://brainly.com/question/31482299

#SPJ8

Answer:

Energy added to solid water will turn it into liquid water; add energy into liquid water and it will be turned into water vapor.

Explanation:

Adding energy is basically adding heat; the more heat, the more excited the molecules of H2O gets. In solid water, the molecules aren't really moving because they don't have a lot of energy, so it is solid. In liquid water (which is water in room temperature), it has a medium amount of energy; the molecules aren't stuck together but it isn't completely dispersed, so it is in liquid form. However, in water vapor, the energy becomes very high and the molecules are excited. The hydrogen bonds holding the molecules together break and the water is released as a vapor.