Faradays constant describes the amount of change associated with

Answer:

Cl2 at 250 K < Cl2 at 300 K < H2S at 250 K < H2S at 300 K.

Explanation:

The correct order of diffusion rate of chlorine is

\(\rm Cl_2\;at\; 250 K < Cl_2\; at\; 300 K < H_2S \;at\; 250 K < H_2S\; at\;300\; K.\)

The diffusion rate depends upon various factors such as concentration gradient, the amount of surface area, and the distance travelled by the gas particles.

We can calculate the rate of diffusion by the amount of gas passing by an area unit of time.

Thus, the correct order is

\(\rm Cl_2\;at\; 250 K < Cl_2\; at\; 300 K < H_2S \;at\; 250 K < H_2S\; at\;300\; K.\)

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Answer:

Explanation:

.01 mol CaSO4 is the conversion factor between these values and now you just need to multiply it by the molar mass of .01 x 136.14=1.36g CaSO4

Apologies for having the wrong answer before this, it's been a long day.

Answer:

1.510 × 10⁻¹³ g

Explanation:

Step 1: Given data

Number of atoms of vanadium: 1.000 × 10⁹ atoms

Step 2: Calculate the molecules of V₂O₅ that contain 1.000 × 10⁹ atoms of V

Each molecule of V₂O₅ has 2 atoms of V.

1.000 × 10⁹ atom V × (1 molecule V₂O₅/2 atom V) = 0.5000 × 10⁹ molecule V₂O₅

Step 3: Calculate the moles corresponding to 0.5000 × 10⁹ molecules of V₂O₅

We will use Avogadro's number: there are 6.022 × 10²³ molecules of V₂O₅ in 1 mole of V₂O₅.

0.5000 × 10⁹ molecule × (1 mol/6.022 × 10²³ molecule) = 8.303 × 10⁻¹⁶ mol

Step 4: Calculate the mass corresponding to 8.303 × 10⁻¹⁶ moles of V₂O₅

The molar mass of V₂O₅ is 181.88 g/mol.

8.303 × 10⁻¹⁶ mol × 181.88 g/mol = 1.510 × 10⁻¹³ g

Answer: see below

Explanation: filling the blanks in this order

point source

Pollution

Wastewater

waste

Nonpoint source

Contaminants

fertiliser

suburban yards

Mass of the pure silver deposited on a metal object made into the cathode of the cell is calculated to be 0.0217 gm.

The process of using electrodeposition to coat an object in a layer of metal is called electroplating .

As we know that, Q = I * t

=0.270 * 72

= 19.44 C

Here Q is quantity of electricity , I is current in amperes = 0.270 A (given)

t is time in seconds (72.0 sec)

As 96500 Coulomb of electricity electrolyzes 1 mole of Ag

then,19.44 C of electricity deposits,

=1/96500 * 19.44

= 0.000201 moles of Ag

Mass of Ag is = number of moles * molar mass

= 0.000201 * 108

= 0.0217 gm

Thus, mass of pure silver deposited on a metal object made into the cathode of the cell is  0.0217 gm.

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Howmuch woodwouldawoodchuckchuckifawoodchuckcouldchuckwoodwoodchuckcouldchuckwoodwoodchuck

Answer:

7 bcs atomic number of atom is its number of proton.

hope it helps.

Answer:

false

Explanation:

The formula of the compound, given that it contains 30 percent N and 70 percent O by mass is NO₂

First, we shall list out the given parameters from the question. This is given

The formula of the compound can be obtained as illustrated below:

Divide by their molar mass

N = 30 / 14 = 2.14

O = 70 / 16 = 4.375

Divide by the smallest

N = 2.14 / 2.14 = 1

O = 4.375 / 2.14 = 2

Thus, we can conclude from the above calculation that the formula of the compound is NO₂

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The formula of the compound that we have is NO2

We'll start by outlining the parameters that the question has provided. This is stated.

N = 30% in terms of nitrogen percentage.

oxygen percentage (O) = 70%

Compound's formula is =?

The compound's formula can be discovered as shown below:

Based on molar mass;

N = 30 / 14 = 2.14

O = 70 / 16 = 4.375

By the smallest number;

N = 2.14 / 2.14 = 1

O = 4.375 / 2.14 = 2

Thus the formula of the compound that we have to find is NO2.

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In order to arrange candidates for recruiting and recruitment purposes, businesses use applicant tracking systems (ATS).

The complete question is,

What do ATSs serve as their primary function?

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Calculating Standard Product ATS, The allocation, presale backorder allocation, turnover, and (optional) on order quantity are added together to form the ATS.

Calculating Standard Product ATS, The allocation, presale backorder allocation, turnover, and (optional) on order quantity are added together to form the ATS. It's equal to the quantity of a product that is reserved for sale by default (the allocation value).

Repeating measurements is the best technique to determine the degree of uncertainty surrounding a set of data.

Mixture ~2 g

T2g = 64.7 ± 0.3°C

Cot 2g 6 e g o

Since all the electrons in t 2g are coupled up, the ligand must have a strong field, and that ligand is oxalate (C 2 O 4).

2−

[Co(C 2 O 4 ) 3] is the name of the substance.

3+

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The number of moles in the final solution is 0.008 moles.

We know that the number of moles can be defined as the ratio of the number of moles to the volume of the solution. We should first find the number of moles in the solution.

Number of moles = 12.0 g/180 g/mol

= 0.067 moles

Initial concentration of the solution = 0.067 moles/100 * 10^-3

= 0.67 M

Using the formula;

\(C_{1}\)\(V_{1}\)= \(C_{2}\)\(V_{2}\)

\(C_{1}\) = initial concentration

\(V_{1}\) = initial volume

\(C_{2}\) = final concentration

\(V_{2}\) = final volume

Then;

0.67 * 60 = \(C_{2}\) * 500

\(C_{2}\) =0.08 M

The number of moles then is;

0.08 M * 100 * 10^-3

= 0.008 moles

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To verify if an equation is balanced, you have the count each one of the present atoms on both sides of it. Let's count on each one of the options until finding the one that's balanced:

A.

The Ag and the K are not balanced.

B.

It means that this equation is balanced.

The answer is B.

The final concentration of I ions in the resulting solution is approximately 0.0311 M, expressed with three significant figures.

To determine the final concentration of I ions in the resulting solution, we need to consider the stoichiometry and volumes of the solutions being mixed.Given:

Volume of NH4l solution = 129.13 mL

Concentration of NH4l solution = 112.9 mM = 0.1129 M (converting from millimolar to molar)

Volume of Mgl2 solution = 105.31 mL

Concentration of Mgl2 solution = 0.87 M

First, we need to determine the moles of NH4l and Mgl2 in their respective solutions:

Moles of NH4l = Volume of NH4l solution * Concentration of NH4l solution

Moles of NH4l = 0.12913 L * 0.1129 M = 0.01459 moles NH4l

Moles of Mgl2 = Volume of Mgl2 solution * Concentration of Mgl2 solution

Moles of Mgl2 = 0.10531 L * 0.87 M = 0.09157 moles Mgl2

Next, we determine the limiting reagent, which is the reactant that is completely consumed and determines the maximum amount of product formed. In this case, the limiting reagent is NH4l because it has fewer moles than Mgl2.

The balanced chemical equation for the reaction between NH4l and Mgl2 is:

2 NH4l + Mgl2 → 2 NH4+ + MgI2

From the balanced equation, we can see that for every 2 moles of NH4l, we get 1 mole of MgI2.

Since the moles of NH4l is the limiting reagent, it will be completely consumed, and the moles of MgI2 formed will be half of the moles of NH4l.

Moles of MgI2 = 0.01459 moles NH4l * (1 mole MgI2 / 2 moles NH4l) = 0.007295 moles MgI2

Finally, we calculate the final concentration of I ions in the resulting solution:

Volume of resulting solution = Volume of NH4l solution + Volume of Mgl2 solution

Volume of resulting solution = 0.12913 L + 0.10531 L = 0.23444 L

Final concentration of I ions = Moles of MgI2 / Volume of resulting solution

Final concentration of I ions = 0.007295 moles / 0.23444 L = 0.0311 M

Therefore, the final concentration of I ions in the resulting solution is approximately 0.0311 M, expressed with three significant figures.

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Answer:

The mass of  Mg  and the mass of  Cl  in the sample

Explanation:

We have that the sample's is purity is simply the mass of Mg and the mass of Cl in the sample

From the Question we are told that

Mass of MgCl2 =5g

Therefore

What we need to  determine that the sample's is purity is simply the mass of Mg and the mass of Cl in the sample because

the mass of MgCl should be equal to mass of Mg and mas of Cl

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Answer:

protons: 6

neutrons: 8

electrons:6

Pressure and volume can be regarded as the entity that is inversely proportional.

It should be noted that this explanatin an be done using the law in chemistry which is the Boyle's law which states that, for a given amount of gas and constant temperature, the volume is inversely proportional to the pressure.

However the Equal quantities of all gases can be seen to have same number of molecules when subjected to the same temperature and pressure (Avogadro's law).

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The unknown quantity of gas is 1.23 moles.

To solve this problem, we can use the ideal gas law equation:

PV = nRT

where P is the pressure in atm, V is the volume in liters, n is the number of moles, R is the gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin.

First, we need to convert the temperature from Celsius to Kelvin:

T = 87.0°C + 273.15 = 360.15 K

Next, we can plug in the given values and solve for n:

(1.20 atm)(31.0 L) = n(0.0821 L·atm/mol·K)(360.15 K)

n = (1.20 atm)(31.0 L) / (0.0821 L·atm/mol·K)(360.15 K) = 1.23 mol

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The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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Answer:

compound

Explanation:

it is calcium oxide, also known as quicklime

Answer: city w

Explanation:

cities w,y,z all use renewable energy (sun, water, wind) which offput any greenhouse emmissions,

city w uses coal which produces greenhouse gases when used (burnt).

hope this helped! ♡

Answer:

$9.97/kg

Explanation:

$4.53      2.2 lb      $9.97

-------  X --------    =   --------

 lb            kg             kg

Answer:

0.93 M

Explanation:

Molarity = \(\frac{Moles}{Volume}\)

4.0M = \(\frac{x}{0.007 L}\)

4.0 M x 0.007 L = Moles = 0.028

Molarity = \(\frac{Moles}{Volume}\)

Molarity = \(\frac{0.028 moles}{0.03 L}\)

= 0.93 M

The molecular formula is (CH2O)5 when the scale factor is 5 and the empirical formula is CH2O.

Considering the question given above, the following data were obtained:

Empirical formula is CH₂O

Molar mass of compound = 150 g/mol

Scaling factor (n) =?

Empirical formula × n = molar mass

[CH₂O]n = 150

[12 + (2×1) + 16]n = 150

[12 + 2 + 16]n = 150

30n = 150

Divide both sides by 30

n = 5

Therefore, the scaling factor is 5

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Answer:

The scale factor is 5. The formula is CH2O.

Multiply each by 5.

So:

C (there is only one)= 1×5

H (there are 2)= 2×5

O(there is only one)= 1×5

Equalling= C5H10O5

a) Calculate the density of the block.

The density of any substance is defined as the mass divided the volume.

Density of the block = mass of the block/volume of the block.

We are given the mass of the block.

mass of the block = 5.60 kg

Since the it is an iron cube, we can find its volume.

Side = 20 cm = 0.20 m

Volume of the block = (side)³

Volume of the block = (20 cm)³ = (0.20 m)³

Volume of the block = 8000 cm³ = 0.008 m³

Now that we know the mass and the volume we can find the density of the block.

Density of the block = Mass of the block / Volume of the block

Density of the block = 5.60 kg / 8000 cm³

Density of the block = 0.0007 kg/cm³

Density of the block = 5.60 kg / 0.008 m³

Density of the block = 700 kg/m³

Answer: The density of the block is 0.0007 kg/cm³ or 700 kg/m³

b) Calculate the mass of water displaced:

If we consider that the cube is completely submerged (as the problem says) it will displace some water. How much water does it displace? Archimedes' says: "The volume of displaced fluid is equivalent to the volume of an object fully immersed in a fluid". That means that the block completely submerged in water (fluid) will displace its volume of water.

volume of water displaced = volume of the block

volume of water displaced = 8000 cm³ = 0.008 m³

Now that we know the volume of water displaced, and since we are given the density of water, we can find the mass of water displaced.

Density of water = mass of water / volume of water

mass of water = volume of water * density of water

mass of water = 0.008 m³ * 1000 kg/m³

mass of water displaced = 8.0 kg

Answer: Supposing that the block is completely submerged it displaces 8.0 kg of water.

Answer:

It is an example of ionic compound and ionic salt

Answer

In 1869, Russian chemist Dimitri Mendeleev proposed the first modern periodic table of elements, in which he arranged the 60 known elements in order of their increasing atomic masses (average mass, considering relative abundance of isotopes in naturally-occurring elements), with elements organized into groups based their similar properties. Mendeleev observed that certain properties recur at regular intervals in the periodic table, thereby defining the groupings of elements.

The gaps represent undiscovered elements predicted by Mendeleev’s periodic table, for example, Gallium (atomic mass 69.7) and Germanium (atomic mass 72.6) . You can read more about Mendeleev’s periodic table

German chemist Lothar Meyer was competing with Mendeleev to publish the first periodic table. The general consensus is that Mendeleev, not Meyer, was the true inventor of the periodic table because of the accuracy and detail of Mendeleev’s work.

Element mendelevium (101) was named in honor of Dimitri Mendeleev.

Evolution of the Modern Periodic Table of Elements

The modern periodic table organizes elements according to their atomic numbers (number of protons in the nucleus) into 7 periods (vertical) and 18 groups (horizontal). The version shown below, in the International Union of Pure and Applied Chemistry (IUPAC) format, accounts for elements up to atomic number 118 and color-codes 10 different chemical series.

Hundreds of versions of the periodic table of elements have existed since Mendeleev’s first version. You can view a great many of these at The Internet Database of Periodic Tables curated by Dr. Mark R. Leach and presented

Glenn T. Seaborg (1912 – 1999) is well known for his role in defining the structure of the modern periodic table. His key contributions to periodic table structure include:

In 1944, Seaborg formulated the ‘actinide concept’ of heavy element electron structure, which predicted that the actinides, including the first 11 transuranium elements, would form a transition series analogous to the rare earth series of lanthanide elements. The actinide concept showed how the transuranium elements fit into the periodic table.

Between 1944 and 1958, Seaborg identified eight transuranium elements: americium (95), curium (96), berkelium (97), californium (98), einsteinium (99), fermium (100), mendelevium (101), and nobelium (102).

Element seaborgium (106) was named in honor of Glenn T. Seaborg.  Check out details Glenn T. Seaborg’s work on transuranium elements

Four newly-discovered and verified elements

On 30 December 2015, IUPAC announced the verification of the discoveries of the following four new elements: 113, 115, 117 and 118.

Credit for the discovery of element 113  was given to a team of scientists from the Riken institute in Japan.

Credit for discovery of elements 115 , 117 and 118 was given to a Russian-American team of scientists at the Joint Institute for Nuclear Research in Dubna and Lawrence Livermore National Laboratory in California.

These four elements complete the 7th period of the periodic table of elements. The current table is now full.

On 28 November 2016, the IUPAC approved the names and symbols for these four new elements: nihonium (Nh), moscovium (Mc), tennessine (Ts), and oganesson (Og), respectively for element 113, 115, 117, and 118.  Nihonium was the first element named in Asia.

Dealing with super-heavy elements beyond element 118

The number of physically possible elements is unknown.

In 1969, Glenn T. Seaborg proposed the following extended periodic table to account for undiscovered elements from atomic number 110 to 173, including the  “super-actinide” series of elements (atomic numbers 121 to 155).

Pyyko 2010 periodic tableSource: Royal Society of Chemistry

You can read more on Pekka Pyykkö’s extended periodic table

You can read more general information on the extended periodic table on Wikipedia at the following link:

These are exciting times for scientists attempting to discover new super-heavy elements.

Where does neutronium fit in the periodic table?

Neutronium is a name coined in 1926 by scientist Andreas von Antropoff for a proposed “element of atomic number zero” (i.e., because it has no protons) that he placed at the head of the periodic table. In modern usage, the extremely dense core of a neutron star is referred to as “degenerate neutronium”.

Neutronium also finds many hypothetical applications in modern science fiction. For example, in the 1967 Star Trek episode, The Doomsday Machine, neutronium formed the hull of a giant, autonomous “planet killer”, and was portrayed as being invulnerable to all manner of scans and weapons. Since free neutrons at standard temperature and pressure undergo β– decay with a half-life of 10 minutes, 11 seconds, a very small quantity of neutronium could be quit

hope this helps

Answer:

Yes

Explanation:

Answer:

See explanation below

Explanation:

You are missing certain data. I found one, in the attached picture. All you have to do is replace your data in this procedure to get an accurate answer.

According to the picture attached, we have 2.4 g of HBr and 1.9 g of NaOH. This mix produces 0.411 g of water. To get the %yield of water, we first need to see how many theorical grams of water are formed. With this we can calculate the %yield.

The overall reaction is:

HBr + NaOH --------> NaBr + H₂O

We have a mole ratio of 1:1 so, let's see which is the limiting reactant between the acid and the base, using the reported molar mass for each (MM HBr = 80.9119 g/mol; MM NaOH = 39.997 g/mol)

moles HBr = 2.4 / 80.9119 = 0.02966 moles

moles NaOH = 1.9 / 39.997 = 0.0475 moles

So, we can clearly see that the moles of NaOH are in excess, so the HBr is the limiting reactant.

As we have a mole ratio of 1:1 with each compound here, and that the HBr is the limiting reactant we can say that:

moles HBr = moles H₂O = 0.02966 moles of water

Now, using the molar mass of water, let's calculate the theorical yield of water: (MM water = 18.01528 g/mol

m H₂O = 0.02966 * 18.01528 = 0.534 g

We have the theorical yield, let's calculate the % yield:

% = 0.411 / 0.534 * 100

% = 76.92%

Answer:

the spiral type of galaxy

Our earth is situated in the Milky Way galaxy. The Milky Way galaxy is a spiral galaxy. Therefore, the correct option is option C.

The Milky Way constellation is indeed a huge spiral formation containing hundreds of trillions of stars, along with the Sun. the irregularly formed belt of stars and gas clouds visible from Earth that spans the sky. despite the reality that Earth is positioned within the Milky Way constellation, astronomers do not completely understand its nature, despite its proximity with other external star systems.

A dense layer of interstellar dust obscures the majority of the Galaxy from optical observatories, and astronomers can only understand its massive building with the assistance of radio and infrared telescopes, which can detect the forms of light that may travel through the obscuring material. Our earth is situated in the Milky Way galaxy. The Milky Way galaxy is a spiral galaxy.

Therefore, the correct option is option C.

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Answer:

\(\text{C}_4\text{H}_6\)

Explanation: