What are the coefficients needed to balance this chemical reaction to show that matter is conserved?

Fe + Cl2 → FeCl3

A
1, 1, 1

B
2, 3, 2

C
3, 2, 2

D
4, 2, 2

Answer:

Theoretical yield of silver = 67.97 g Ag

Percent yield of the reaction = 88.3%

Explanation:

This reaction forms copper(II) nitrate instead of copper(I) nitrate.

First, we have to write the balanced chemical equation for the reaction of copper (Cu) with silver(I) nitrate (AgNO₃) to give silver (Ag) and copper(I) nitrate (CuNO₃):

Cu(s) + 2AgNO₃(aq) → 2Ag(s) + Cu(NO₃)₂(aq)

From the equation, 1 mol of Cu(s) produces 2 moles of Ag(s). We convert the moles to mass with the molecular weight (MW) of the compounds:

MW(Cu) = 63.5 g/mol

mass of Cu = 1 mol Cu x 63.5 g/mol = 63.5 g Cu

MW(Ag) = 107.9 g/mol

mass of Ag = 2 mol Ag x 107.9 g/mol = 215.8 g Ag

Thus, we have the conversion factor: 215.8 g Ag/63.5 g Cu

- From 20.0 g Cu, the following amount of Ag will be obtained:

20.0 g Cu x 215.8 g Ag/63.5 g Cu = 67.97 g Ag (theoretical amount)

- For an actual amount of 60.0 g of Ag, we calculate the percent yield as follows:

%yield = actual amount/theoretical amount x 100 =

           = 60.0 g/67.97 g x 100 = 88.3 %

The block has a density of 7.3 g/ml. The density is the same as for tin. Tin is the metal's true identity.

Absolute population and particle density are the two main types of density. Relative density, also called as coarse aggregate, is the ratio of a substance's density to the volume of a reference substance. The reference substance is often water.

The density of a substance is a measurement of its thickness in relation to its volume. A product will float in a solution if its density is lower than the water's, while it will sink if it has a higher density.

Density of the block can be calculate as follows:

Volume of metal = 1xb×h

I = 0.5839 in

b = 0.531 in

h = 0.4981 in

volume = 0.5839×0.531×0.4981

=0.1544363

=2.53ml

mass of metal =1.84×10⁴ mg

=18.4 g

density = g/ml

=18.4/2.53

=7.3 g/ml

from its density we can conclude the block of metal is Tin

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When a beaker of ethanoic acid is placed in the refrigerator and mix it with sodium carbonate, its temperature drops down and endothermic reaction take place.

[tex]2CH_{3} COOH + NaCO_{3}[/tex]    ⇒ [tex]CH_{3}COONa + NaHCO_{3}[/tex]

This chemical reaction is a reversible reaction.

Ethanoic acid and sodium carbonate combine to form an endothermic reaction that results in fizzing as carbon dioxide is released and heat is lost to the environment, making the reaction vessel feel chilly to the touch.

The difference between adding sodium carbonate to the solution and refrigerating ethanoic acid is that no new substance is created in the former. When the substance is taken out of the refrigerator, it is still ethanoic acid. New chemicals are created in the latter scenario. Because of a chemical process, the material is no longer ethanoic acid.

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Answer:

7. .........................

The concentration of the standard solution (in M) if 15 mL of a 0.2512 M Co(NO3)2 stock solution is added to a 50 mL volumetric flask and diluted to the mark is  0.07536M.

Given volume of Co(NO3)2 stock solution (V1) = 15mL =0.015L

Concentration of Co(NO3)2 stock solution is (M1) = 0.2512M

Volume of  volumetric flask (V2) = 50mL = 0.050L

Concentration of standard solution = M2

The number of moles of solute divided by the number of liters of solution is the definition of molarity, a concentration unit in chemistry.

We know that M1V1 = M2V2. Such that,

0.2512 x 0.015 = M2 x 0.050

M2 = 0.07536M

Hence the required concentration of standard solution is  0.07536M

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Answer:

1.346 meters per second

Explanation:

You traveled 35 meters in 26 seconds

35 / 26 = avg speed.

35 / 26 = 1.346...

Te, S, and c are the following sets of elements, and they will all produce ions with a charge of two (option b).

An essential element of a totality. In chemistry, a simple substance is one that cannot be divided into smaller components or transformed into another substance. An element's fundamental building block is an atom, which is made up of protons, neutrons, & electrons. The number of atoms in an element's protons is continuous.

Earth, Water, Wind, Fire, Ice, Thunder, Time, Flower, Shadow, Light, and Moon are the twelve natural elements. These simplified terminology for more advanced and complicated compounds refer to each of these elements.

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Answer:

You have not shown the liquid which is to be shown, please show us

Answer:

Cloud cover feedback

Explanation:

Answer:

Cloud cover feedback

Explanation:

took a test on this and got it correct! hope this helps! have a good day!

For a certain brand of gasoline, which has a density of 0.733 g/mL at 25 oC, 41848 grammes would fill a 10.7 gal tank. Mass in relation to volume is referred to as density.

Although the Latin letter D can also be used, the symbol for density is most frequently written as (the lower case Greek letter rho). Any combination of gases can be considered a gas gas solution. As a result of their great distance from one another, gas molecules typically only interact very little. All gases can therefore be thought of as being soluble in one another.

15x 3785.41 ml = 56781.15 ml. Consequently, the mass is calculated as 0.737g/ml x 56781.15 ml = 41848 grammes.

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The normal boiling point for acetone is 56.5°C. At an elevation of 5300 ft the atmospheric pressure is 630. torr. The vapor pressure of acetone at 22.0°C at this elevation is 212.22 torr.

The equilibrium pressure of a vapour above its liquid (or solid), or the pressure of the vapour produced by the evaporation of a liquid (or solid) above a sample of the liquid (or solid) in a closed container, is the vapour pressure of a liquid. Substance; vapour pressure at 25 °C, as examples.

In Step 1:

The normal boiling point for acetone = 56.5°C.

At an elevation of 5300 ft the atmospheric pressure = 630 torr

ΔHvap = 32.0 kJ/mol

The temperature is 24.0 °C

In Step 2:

ln(p1/p2) = (∆ H/R) (1/T2 - 1/T1)

Normal atmospheric pressure

= 1 atm

= 760 torr

So, (760/630) = ((32.000 J/mol) / (8.314 J/K*mol)) (1/T2 - 1/329.65 K).

T2 = 324.4 K = 51.25 °C.  

This is the boiling point of acetone at 5300 ft.

The vapor pressure = atmospheric pressure at the boiling point for any liquid.

ln (Pv/630atm) = ((32.000 J/mol) / (8.314 J/K*mol)) (1/324.4 K - 1/297.15)

ln (Pv/630) = -13615388.3

Pv = 212.22 torr

Thus, The vapor pressure of acetone at 22.0°C at this elevation is 212.22 torr.

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Answer:

B and C

Explanation:

powder dissolve faster than particles

the higher the temperature the faster the dissolving process

a reaction such as A+B -> products that exhibits second-order kinetics can be studied using a large excess of one reactant. Under these conditions, the concentration of the reactant in excess will not change much during the reaction, which will exhibit pseudo-first-order kinetics.

A fraud or imposter is defined as something or someone that is false but attempts to pass for the real deal. Although it's typically a prefix, pseudo can refer to a faker. A pseudo-intellectual, for instance, will attempt to persuade you that he has a brilliant mind despite the fact that he does not. The fame of a pseudo-celebrity is minimal. A combining form with the meaning "false," "pretended," or "unreal," used in the creation of compound words (pseudo classic; pseudointellectual); in science, designating a close or deceptive resemblance to the following element (pseudobulb; pseudocarp); and occasionally used in the chemical names of isomers (pseudoephedrine). a person who professes to be skilled in academic or creative endeavours but lacks in-depth comprehension or critical thinking. a person who exaggerates their intelligence and engages in intelligence fraud.

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The statement given is true. No matter where you live or what the outside temperature is, you should always start your vehicle and let it warm up for a few minutes.

An object's thermal energy content is measured by its temperature, while heat is the movement of thermal energy between objects of different temperatures.

The average kinetic energy of all the atoms or molecules that make up matter defines temperature in chemistry. Not all materials have the same kinetic energy. A particle can be described using the kinetic energy distribution of the particle at a point in time.

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The complete question is as follows:

Regardless of where you live and what temperature it is outside, you should always start the vehicle and give it a few minutes to warm up. (True/False)

Answer:

At STP, 1 mole of gas occupies 22.4 L. That means 0.25mol of H2 gas will take up 5.6 L of space.

Answer:

D.A-C would have the same number of atom

By beta, tungsten 188 decays. The mechanism through which an insecure atomic structure is produced is known as radioactive decay.

The process through which highly unstable molecular nucleus loses its energy through radiation is described as radioactive decay, also characterized as nuclear decay, radiography, radioactivity breakdown, or nuclear disintegration. A substance that has unstable nuclei is regarded as radioactive. For a large variety of human activities, radioactive decay is crucial.

Alpha, beta, and/or gamma rays are all types of ionizing radiation that are released when radioactive atoms decay. Because the energy is powerful enough to dislodge firmly coupled electrons from just an atom's orbit, it is known as ionizing radiation. As a result, the atom develops into a charged ion.

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In a container, the pressure of hydrogen sulfide gas is 267.4 torr.

The force of all gas particle/wall collisions divided by the area of the wall is defined as pressure (P): Pressure is one of the primary observable quantities of this phase of matter; it is exerted by all gases. The amount of force exerted per area is described as pressure. Pressure is defined as force divided by area. The pressure from snow on a roof, for example, would equal the weight of the snow divided by the area of the roof. In chemistry, pressure is often generated by gases. When you blow up a balloon, you fill it with gas.

Here,

pressure of hydrogen sulfide gas= 35650 Pa

1 torr=133.33 Pa

=35650/133.33

=267.38 torr

The pressure of hydrogen sulfide gas in a container is 267.4 torr.

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Considering the definition of molar mass,  the mass in 2.6 moles of C₈H₁₂ is 0.2808 kg.

The molar mass of an atom or molecule is the mass of one mole of that particle expressed in grams.

The molar mass of a compound is the sum of the molar mass of the elements that form it multiplied by the number of times they appear in the compound.

Being the molar mass of C₈H₁₂ 108 g/mole, you can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 108 grams, 2.6 moles of the compound contains how much mass?

mass= (2.6 moles× 108 grams)÷ 1 mole

mass= 280.8 grams= 0.2808 kg (being 1000 gr= 1 kg)

Finally, the mass is 0.2808 kg.

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Answer: to calculate pH use -log[H+] or - log[OH-]..the solution is basic as the “NaOH” is attached to a hydroxide.Since we need to find the pH (per hydrogen) and not the pOH( per hydroxide) we need to find the pOH of the substance first then we subtract that by 14 so we can arrive at the pH of the substance.

Explanation: So -log( 1 x 10^(-5)) = 5 which is the pOH.Now we subtract that by 14 which gives us -9 and now you’d multiply that by -1 bcuz we can’t have a negative so the pH of the substance is 9

Answer:

The Circuit will be OPEN since the current source is disconnected.

So if its not turned on... The circuit remains Open

Answer

Option A.

Answer:

3 Ca

3 S

12 O

Explanation:

You have 3 moles of Ca(SO4)

Therefore you multiply the subscript of each atom of the compound by 3.

Ca and S have a understood subscript of 1 so there are three of each.

There are 4 oxygen atoms in one mole of CaSO4 so in 3 moles there would be 4*3 so 12

The element box contains name and symbol of the element, number of protons and electrons, atomic mass, and electron configuration.

Each container represents an detail and incorporates its atomic size, symbol, common atomic mass, and (sometimes) name. The factors are organized in seven horizontal rows, referred to as intervals or series, and 18 vertical columns, referred to as groups. The container containing every detail's records is called the detail key. Each key incorporates an detail's name, precise symbol, atomic weight and atomic variety. Oxygen, for example, has an atomic variety of 8, an atomic weight of 15.996 and a completely unique symbol, O. The table is split into 4 more or less square regions referred to as blocks. The rows of the desk are referred to as intervals, and the columns are referred to as groups. Elements from the equal institution of the periodic table display comparable chemical characteristics.

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The formula for the equilibrium constant is; [tex][HI]^{2} /[H_{2} ] [I_{2} ][/tex]

We know that when we talk about the equilibrium constant that we are looking at the kind of constant that shows the extent to which there has been the conversion of the reactants to the products.

We can be able to obtain the equilibrium constant of the system by the application of the law of mass action and this would give the correct6 form of the expression for the equilibrium constant. This is how we know which of the species would have the square.

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Answer:

Using the VSEPR theory, the electron bond pairs and lone pairs on the center atom will help us predict the shape of a molecule. The shape of a molecule is determined by the location of the nuclei and its electrons. The electrons and the nuclei settle into positions that minimize repulsion and maximize attraction.

Answer:

1Cu --> 1Cu+2 + 2e

2e +1S-->1S-2

Cu + S --> CuS

Explanation:

The propensity of an atom of a certain chemical element to draw shared electrons when forming a chemical bond is known as electronegativity and is denoted by the symbol X.

The atomic number and the separation of the valence electrons from the charged nucleus have an impact on an atom's electronegativity. An atom or a substituent group will draw electrons in greater amounts the higher the associated electronegativity. The sign and amplitude of a bond's chemical polarity, which characterizes a bond along the continuous scale from covalent to ionic bonding, can be quantitatively estimated using electronegativity. The inverse of electronegativity is electropositivity, which describes an element's propensity to accept valence electrons.

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Steel piping systems have a history of degrading under salt brine. It is possible to neutralize their corrosive effects by using sodium dichromate.

For melting snow and ice on sidewalks, parking lots, and roads, salt brine is a practical liquid solution. When the salt content of the water reaches a certain proportion, salt brine is produced in tanks that circulate certain volumes of water and rock salt. After that, the solution is pumped into holding tanks in order to be used. In order to address particular temperature ranges of a storm and improve the application's efficacy, other components like calcium or magnesium may be added.

In advance of winter weather, surfaces are pre-treated with salt brine. If Salt Brine is used ahead of a winter storm, it will start to function as soon as the first snowflake falls and assist prevent the accumulation of snow and ice on the pavement.

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C. the denser the plants the better.

Answer:

C

Answer: Plants with higher density of the bacteria on their roots have increased rates of survival reproduction

Explanation:

Answer:

on your face

Explanation:

because when the light is falling on your hand (which already blocked your view of the lamp) then the shadow will fall on your face