How many moles of C are needed to produce 4.5 moles of CO?

How many grams of antimony (Sb) are produced when 56.7 grams of antimony oxide (Sb2O3) are used up completely?

A chemist is able to collect 18.3 grams of Sb from the reaction of 42 grams of C with excess Sb2O3. What is the chemist’s percent yield of Sb?

A chemist has 62 grams of Sb2O3 and 33 grams of C available to produce Sb. What is the limiting reagent?

So, 30 g of the solid substance absorbed 79.5 J of heat during the phase change.

The heat of fusion is the amount of heat energy required to melt one gram of a substance at its melting point. Therefore, to calculate the amount of heat absorbed during the phase change of 30 g of the solid substance with a heat of fusion of 2.65 J/g, we can use the following formula:

Q = m * ΔHf

here Q is the amount of heat absorbed (in joules), m is the mass of the substance (in grams), and ΔHf is the heat of fusion (in joules per gram).

Q = 30 g * 2.65 J/g

= 79.5 J

Therefore, 30 g of the solid substance absorbed 79.5 J of heat during the phase change.

Learn more about heat Visit: brainly.com/question/934320

#SPJ4

Based on the mass ratio, the mass of H₂ produced is 3.51 g of H₂

The mass ratio of a reaction is the ratio of the masses of the reactants as well as as products in a balanced equation of a reaction.

The equation of the reaction is given below;

2 AI + 6 HCI → 2 AICI₃ + 3 H₂

From the reaction equation, 2 * 27 g of Al produces 3 * 2 g of H₂

32.25 g of Al will produce: 6/55 * 32.25 g of H₂

Therefore, mass of H₂ produced is 3.51 g of H₂

Learn  more about mass ratio at: https://brainly.com/question/14577772

#SPJ1

Answer:

From the reaction equation, 2 * 27 g of Al produces 3 * 2 g of H₂

32.25 g of Al will produce: 6/55 * 32.25 g of H₂

Therefore, mass of H₂ produced is 3.51 g of H₂

Explanation:

The structure that corresponds to the structure of pentanoic acid is both

CH₃CH₂CH₂CH₂COOH and also by the line formula as in Option B ,

Option C is the right answer.

Pentanoic Acid is given by the formula C₅H₁₀O₂ and a straight chain alkyl Carboxylic acid.

The structure that corresponds to the structure of pentanoic acid is both

CH₃CH₂CH₂CH₂COOH and also by the line formula as in Option B ,

Therefore Option C is the right answer.

To know more about Pentatonic Acid

https://brainly.com/question/16900825

#SPJ1

Given parameters:

mass of an empty beaker = 65gm

mass of the beaker and water = 165gm

volume of water = 100cm³

Unknown:

Density of water  = ?

Solution:

Density is the mass per unit volume of a substance;

           Density  = \(\frac{mass}{volume}\)

To find the mass of the water ;

   Mass of water  = Mass of beaker and water - mass of an empty beaker

                            = 165g - 65g

                           = 100g

So input parameters and solve;

         Density  =  \(\frac{100g}{100cm^{3} }\)  

         Density of the water in the beaker  = 1g/cm³

If 100 g of calcium carbonate is allowed to decompose, 56 g of calcium oxide is produced. The mass of carbon dioxide is produced by the decomposition will be 44g

According to the given equation

CaCO₃ → CO₂ + CaO

As

mass of CaCO₃ = 100g

mass of CaO = 56g

mass of CO₂= ?

depending on the conservation of mass

mass of the reactant = mass of the product

100 g  =  ( X +  56 )

mass of CO2 =  100 - 56

= 44 g

So the mass of carbon dioxide is produced by the decomposition will be 44g

To look more about carbon dioxide click here

brainly.com/question/15063989

#SPJ4

Answer:

The second student with mass 70kg has more momentum

Explanation:

Using the formula:

p = m × v

Where;

p = momentum (kgm/s)

m = mass (kg)

v = velocity (m/s)

According to this question, two students are running in a cross country race.

Student 1 has the following; m = 60kg, v = 7m/s

Student 2 has the following; m = 70kg, v = 7m/s

Using p = mv

Student 1, p = 60 × 7 = 420 kgm/s

Student 2, p = 70 × 7 = 490 kgm/s

From the result of the above calculations, student 2 with mass 70kg has more momentum.

Answer:

Yes.

Explanation:

Electric charge cannot change the elemental composition of a substance.

The application of charge to the aluminium foil does not change the composition of the foil and hence the foil will still be made up of aluminium atoms.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

Learn more about atom,here:

https://brainly.com/question/14214017

#SPJ2

The part of methanol's formula that resembles water is the -OH group, which is the hydroxyl group. This is because water also has a hydroxyl group, which is represented by -OH.

The hydroxyl group is responsible for the polar nature of both methanol and water, which makes them capable of forming hydrogen bonds with other polar molecules.

This makes them effective solvents for polar substances such as salts, sugars, and acids.

The part of methanol's formula that is different from water is the presence of the methyl group (-CH3). Methyl is a non-polar group, which makes methanol less polar than water.

This non-polar nature makes methanol a better solvent for non-polar substances such as oils, fats, and waxes.

Overall, while methanol and water share similarities in their polar nature due to the presence of the hydroxyl group, the presence of the non-polar methyl group in methanol sets it apart from water in terms of its solubility properties.

This difference in solubility properties can be useful in separating different types of substances or in performing specific chemical reactions.

To know more about hydroxyl group here

https://brainly.com/question/23639315

#SPJ11

Answer:

305 seconds

Explanation:

Grams of Chromium(III) nitrate produced : 268.95 g

Given

0.85 moles of Lead(IV) nitrate

Required

grams of Chromium(III) nitrate

Solution

Reaction

Balanced equation :

2Cr₂ + 3Pb(NO₃)₄ ⇒ 4Cr(NO₃)₃ + 3Pb

From the equation, mol ratio of Pb(NO₃)₄  : Cr(NO₃)₃ = 3 : 4, so mol Cr(NO₃)₃

mol Cr(NO₃)₃ =

\(\tt \dfrac{4}{3}\times 0.85=1.13\)

Mass of Chromium(III) nitrate (MW=238.0108 g/mol) :

mass = mol x MW

mass = 1.13 x 238.0108

mass = 268.95 g

Answer:

28 g CO

Explanation:

First convert grams to moles.

1 mole C = 12.011 g (I'm just going to round to 12 for the sake of this problem)

12 g C • \(\frac{1 mol C}{12 g C}\) = 1 mol C

1 mol O = 15.996 g (I'm just going to round to 16)

16 g O • \(\frac{1 mol O}{16 g O}\) = 1 mol O

So the unbalanced equation is:

\(C + O_{2}\) -> \(CO\) (the oxygen has a 2 subscript because it is part of HONClBrIF meaning when not in a compound these elements appear in pairs - called diatomic elements)

The balanced equation is:

\(2 C + O_2\) -> \(2 CO\)

However, carbon is the limiting reactant in this equation and two moles cannot react because only 12 g (1 mole) are present. Therefore, use the equation

\(C + \frac{1}{2} O_2\) -> \(CO\).

1 mole of CO is formed, therefore 12 g + 16 g = 28 g CO.

2 Sodium azide(s) 2 Sodium(s) + 3 Nitrogen(g) is the balanced chemical equation for the breakdown of sodium azide (Sodium azide). As a result, 13.65 moles of Nitrogen gas will be created from 9.1 mol of Sodium azide.

According to Avogadro's law, a gas's total number of atoms or molecules is directly proportional to the volume of gas that gas occupies at a given pressure and temperature. The formula for Avogardro's equation is V = k n or V1/n1 = V2/n2.

We can use the following ratio to determine how many moles of Nitrogen gas are created by the breakdown of 9.1 mol of Sodium azide:

2 mol Sodium azide / 3 mol Nitrogen = 9.1 mol Sodium azide/ x mol Nitrogen

where x represents the quantity of Nitrogen generated in moles.

After finding x, we obtain:

x = 9.1 mol Sodium azide × 3 mol Nitrogen / 2 mol Sodium azide

x = 13.65 mol Nitrogen

To know more about Avogadro's law visit:-

https://brainly.com/question/4133756

#SPJ9

Immediately tell your instructor/teacher

Evaporate then condense then precipitate then runoff

Explanation:

greenhouses use this information

lot of cold places like in russia have greenhouses to grow crops

you make a mini version of a greenhouses in your home with a soda bottle

Water Cycle Transformations

The water cycle depends on the transformation of water into different forms. Starting as liquid, water can:

Evaporate: The transformation of liquid water into water vapor is important for the water cycle. When water on the Earth's surface, such as in oceans, lakes, and rivers, is heated by the sun, it turns into water vapor and rises into the atmosphere.

Condense: As the water vapor rises, it cools and transforms back into liquid water through a process called condensation. This is important because the water droplets eventually form clouds, which can lead to precipitation.

Precipitate: Precipitation is another important transformation of water in the water cycle. When the clouds become heavy with water droplets, they release the water in the form of rain, snow, sleet, or hail.

Runoff: The water that falls to the ground in precipitation can then flow over the surface of the land, as runoff, eventually making its way back into the oceans, lakes, and rivers, where the cycle starts again.

The transformation of water from one state of matter to another is essential for the water cycle because it ensures that water is continually recycled and available for plants, animals, and humans to use. Without these transformations, the water on Earth would not be able to sustain life as we know it.

chatgpt

A mixture has a mas of 450 grams. Of that mixture,35 grams is sulfur . Therefore, 11% is the percentage of sulfur in the mixture.

The mass percent equation is defined as the mass of each element in one mole of the compound, as well as the molar mass. With these masses, you can calculate each element's mass proportion.

In order to represent the mass percent of a solution, the kilograms of solute are divided by the kilograms of solution, and the result is multiplied by 100.

percentage of sulfur = mass of sulfur/ mass of mixture×100

mass of sulfur= 5 grams

mass of mixture =450 grams

substituting all the given values in the above equation, we get

percentage of sulfur = 5 / 450=0.011×100= 11%

Therefore,  11% is the percentage of sulfur in the mixture.

To know more about mass percentage, here:

https://brainly.com/question/28973847

#SPJ1

Answer: The answer is C.) NH3

Explanation:

Ammonia is a covalent compound because the nitrogen and hydrogen atoms are nonmetals in nature. Ammonia (NH3) is a covalent compound because the nitrogen and hydrogen atoms are nonmetals in nature, they don’t have any tendency of either accepting or donating the electrons but both nitrogen and hydrogen atoms have a tendency to share their valence electron with each other.

Hope this helps mark brainliest please :)

Answer:

A

Explanation:

Florine F and Bromine Br these two elements have same physical and chemical properties. Hence option A is correct.

Atom is smallest entity of a body. Body is made up of atoms. it is basic building block of a body. An atom consist of electrons, protons and neutrons as sub atomic particle. whole mass of the atom is concentrated at the center of the atom which we call it as nucleus, nucleus consist of proton and neutron. Electron revolve around the nucleus at determined(fixed) orbit. Total number of protons in the atom decides the atomic number and  the elements in the periodic table.

The electrons which are completely filled orbitals are called as core shell electrons and which are not filled completely are called as valence electron. valence electrons are responsible for physical and chemical properties of the element. Elements which are on same column in periodic table have same number of valence electrons . Hence they have same properties.

Chlorine, Florine and bromine comes in halogen group. it require only one electron to complete its Octet rule. chemical and physical properties are decided by the valence electron of the element. As Florine and Bromine has same valence electron as chlorine. their properties also likely to be same.

Hence option A is correct.

To know more about atom :

https://brainly.com/question/29695801

#SPJ3.

The vapor pressure of hexane at 25.00 °C is approximately 0.292 atm.

To calculate the vapor pressure of hexane at 25.00 °C, we can use the Clausius-Clapeyron equation:

\(ln(P2/P1) = (-ΔHvap/R) * (1/T2 - 1/T1)\)

Where:

P1 is the vapor pressure at the boiling point (68.73 °C) (unknown)

P2 is the vapor pressure at the desired temperature (25.00 °C)

ΔHvap is the molar enthalpy of vaporization (28.9 kJ/mol)

R is the ideal gas constant (8.314 J/(mol·K))

T1 is the boiling point temperature in Kelvin (68.73 + 273.15)

T2 is the desired temperature in Kelvin (25.00 + 273.15)

Rearranging the equation, we get:

\(P2/P1 = e^((-ΔHvap/R) * (1/T2 - 1/T1))\)

To find P1, we can rearrange the equation further:

\(P1 = P2 / e^((-ΔHvap/R) * (1/T2 - 1/T1))\)

Substituting the given values into the equation:

\(P1 = P2 / e^((-28.9 kJ/mol / (8.314 J/(mol·K))) * (1/(25.00 + 273.15) - 1/(68.73 + 273.15)))\)

Calculating the right-hand side of the equation and substituting P2 = 1 atm (since it's the standard pressure):

\(P1 = 1 atm / e^((-28.9 kJ/mol / (8.314 J/(mol·K))) * (1/(25.00 + 273.15) - 1/(68.73 + 273.15)))\)

P1 ≈ 0.292 atm

Learn more about vapor pressure here :-

https://brainly.com/question/29640321

#SPJ11

\(\\ \tt\longmapsto Density=\dfrac{Mass}{Volume}\)

\(\\ \tt\longmapsto Density=\dfrac{1055}{93.4}\)

\(\\ \tt\longmapsto Density=11.29g/cm^3\)

The measure of how densely a material is packed together is called density. As the mass per unit volume, it has that definition. The density of a chunk of lead that has a mass of 1055 grams is  11.29 g/cm³.

The density of a substance indicates how dense it is in a given area. Mass per unit volume is the definition of a material's density. In essence, density is a measurement of how closely stuff is packed. It is a particular physical characteristic of a specific thing.

The expression used to calculate density is:

Density = Mass / Volume

mass = 1055 g

volume = 93.4 cm³

Density = 1055 / 93.4

Density = 11.29 g/cm³

To know more about density, visit;

https://brainly.com/question/31237897

#SPJ3

Answer:

As an indicator

Answer:

no, because our nation is just too big. it would be difficult to keep track of votes and find a common ground amongst all the people

Answer:

egg

Explanation:

man

Answer:

A)Protons and electrons

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

when an atom lose or gain the electron ions are formed and number of protons and electrons no longer remain the same.

For example:

An atom of sodium when lose one electron it form positive ion. The number of electrons became 10 and number of protons remain 11.

Na → Na⁺ + 1e⁻

Answer:

cellular respiration

Explanation:

Organisms ingest large molecules, like carbohydrates, proteins, and fats, and convert them into smaller molecules like carbon dioxide and water. This process is called cellular respiration, a form of catabolism, and makes energy available for the cell to use.

To make an E9 mixture 8657.14 gal of E7 should be mixed with 3000 gal of E10

Given to us is the amount of ethanol in the E10 mixture is 10% of 3000 gallons:

Ethanol in E10 = 10% × 3000 gal = 0.10 × 3000 gal = 300 gal

To solve this problem, we can set up an equation based on the amount of ethanol in each mixture.

Let x represent the amount of E7 mixture (in gallons) that needs to be added to the E10 mixture to obtain the desired E9 mixture.

The amount of ethanol in the E7 mixture is 7% of x gallons:

Ethanol in E7 = 7% ×  gal = 0.07 × gal

The resulting E9 mixture will contain 9% ethanol of the total volume of 3000 + x gallons:

Ethanol in E9 = 9% × (3000 + x) gal = 0.09 × (3000 + x) gal

According to the problem, the resulting E9 mixture contains 906 gallons of ethanol:

Ethanol in E9 = 906 gal

Now we can set up the equation:

Ethanol in E10 + Ethanol in E7 = Ethanol in E9

300 gal + 0.07x gal = 906 gal

Subtracting 300 gal from both sides:

0.07x gal = 606 gal

Dividing both sides by 0.07:

x = 606 gal / 0.07

x = 8657.14

Therefore, approximately 8657.14 gallons of E7 mixture should be mixed with 3000 gallons of E10 to make an E9 mixture.

Learn more about ethanol mixtures here:

https://brainly.com/question/28954299

#SPJ4

Complete question: Ethanol fuel mixtures have "E" numbers that indicate the percentage of ethanol in the mixture by volume. For example, E10 is a mixture of 10% ethanol and 90% gasoline. How much E7 should be mixed with 3000 gal of E10 to make an E9 mixture?

The aldehyde group in phenol red converts to ketone on increase in pH.

Phenol red contains phenolsulfonphthalein. Containing three aromatic rings, the molecule contains aldehyde group -OH and sulfite group. The mentioned molecule is weak acid and dissociates into unionized acidic and basic form.

The increase in pH is associated with increase in hydroxyl ions. The hydroxyl ion reacts with hydroxyl group present on middle aromatic ring. Further electron translocation occurs converting sulfite group to sulfite ion. Also, the reaction results in conversion of aldehyde to ketone form.

Further addition of hydrogen will again convert ketone to aldehyde thus converting back to its original form and phenol red color.

Learn more about phenol red indicator -

https://brainly.com/question/6820241

#SPJ4

Kb1 = 1.61 × 10^-10 and Kb2 = 4.35 × 10^-9. The basicity constant, or Kb, is a measure of the strength of a base in a particular chemical reaction. The products of a reaction of a weak base and water with the corresponding acid determine the base constant.

For example, for a given acid and base, Kb1 and Kb2 are the basicity constants for the first and second base dissociations, respectively, of the base. The formulas and charges of the conjugate acid and base, as well as the acid dissociation constants, Ka1 and Ka2, are needed to calculate Kb1 and Kb2.

The following reactions are balanced chemical reactions that represent the dissociation of succinic acid:

Reaction 1: H2C4H4O4(aq) + H2O(l) ⇌ HC4H4O4(aq) + H3O+(aq) Ka1 = 6.2 × 10−5
Reaction 2: HC4H4O4(aq) + H2O(l) ⇌ C4H4O42-(aq) + H3O+(aq) Ka2 = 2.3 × 10−6

The values of Ka1 and Ka2 can be used to calculate Kb1 and Kb2, respectively, using the following equation:

Ka1 × Kb1 = Kw

where Kw is the ion-product constant for water, which is 1.0 × 10−14 at 25°C.

Kb1 can be calculated as follows:

Kw = Ka1 × Kb1

Kb1 = Kw / Ka1

Kw = 1.0 × 10^-14

Ka1 = 6.2 × 10^-5

Kb1 = Kw / Ka1

Kb1 = 1.0 × 10^-14 / 6.2 × 10^-5

Kb1 = 1.61 × 10^-10

Kb2 can be calculated using the same method:

Kw = Ka2 × Kb2

Kb2 = Kw / Ka2

Kw = 1.0 × 10^-14

Ka2 = 2.3 × 10^-6

Kb2 = Kw / Ka2

Kb2 = 1.0 × 10^-14 / 2.3 × 10^-6

Kb2 = 4.35 × 10^-9

Therefore, Kb1 = 1.61 × 10^-10 and Kb2 = 4.35 × 10^-9.

To learn more about basic visit;

https://brainly.com/question/31939284

#SPJ11

A compound of molecules results from the combination of atoms from the same or distinct elements. Reason: According to the atomic theory of matter: In 1808, it is declared by the British chemist John Dalton.

Dalton's atomic theory is founded on evidence, but Democritus had no supporting data for his idea. This is the primary distinction between the two theories' atomic theories.

All matter is made up of indivisible atoms, according to the first component of his theory. The second aspect of the theory states that the mass and properties of every atom in a particular element are the same.

To know more about atomic theory of Dalton visit :-

https://brainly.com/question/4121965

#SPJ1