Can u please help me , I’m stuck it’s question e

Answer:

A. 1.25 moles of C.

B. 0.96 mole of CO.

C. 1 mole of SO2.

D. 0.5 mole of CS2.

Explanation:

We'll begin by writing the balanced equation for the reaction between carbon, C and sulphur (iv) oxide, SO2.

This is given below:

5C + 2SO2 → CS2 + 4CO

From the balanced equation above,

5 moles of C reacted with 2 moles of SO2 to produce 1 mole of CS2 and 4 moles of CO.

A. Determination of the number of moles of C needed to react with 0.5 mole of SO2.

This can be obtained as follow:

From the balanced equation above,

5 moles of C reacted with 2 moles of SO2.

Therefore, Xmol of C will react with 0.5 mole of SO2 i.e

Xmol of C = (5 x 0.5)/2

Xmol of C = 1.25 mole

Therefore, 1.25 moles of C is needed for the reaction.

B. Determination of the number of moles of CO produced when 1.2 moles

of C reacted.

From the balanced equation above,

5 moles of C reacted to 4 moles of CO.

Therefore, 1.2 moles of C will react to produce = (1.2 x 4)/5 = 0.96 mole of CO.

Therefore, 0.96 mole of CO was obtained from the reaction.

C. Determination of the number of moles of SO2 required to produce 0.50 mole of CS2.

This can be obtained as follow:

From the balanced equation above,

2 moles of SO2 reacted to produce 1 mole of CS2.

Therefore, Xmol of SO2 will react to produce 0.5 mole of CS2 i.e

Xmol of SO2 = (2 x 0.5)/1

Xmol of SO2 = 1 mole.

Therefore, 1 mole of SO2 is needed for the reaction.

D. Determination of the number of moles of CS2 produced when 2.5 moles of C reacted.

From the balanced equation above,

5 moles of C reacted to produce 1 mole of CS2.

Therefore, 2.5 moles of C will react to produce = (2.5 x 1)/5 = 0.5 mole of CS2.

Therefore, 0.5 mole of CS2 was produced from the reaction.

Answer:

i got ddoxed by skai jackson

Explanation:

it sucked

Answer:

Option C

Explanation:

Litmus paper shows only whether the solution is acidic or basic, but not how strong it is.

=> Base turns the red litmus paper blue

=> Acid turns the blue litmus paper red.

Answer:

Cultural Pest Control.

Explanation:

The cultural pest control is one of the oldest methos of pest control. This form of pest control is less practiced these days since curative form of pest control methods have been invented. The cultural pest control method is a preventive method of managing pest population. This pest control method takes long days of planning and execution.

In this form of pest control method, the farmer had to change the timings of his farming operations in his field. This method requires careful timing in seeding and planting. This method of pest controlling requires knowledge and skills of fields.

Thus the correct answer is the third option.

Answer:

cultural pest control

Explanation:

The answer is

O ionic

Answer: Polar covalent

Explanation: Gradpoint

Answer:

Al(s) + Fe³⁺ ----> Al³⁺(aq)  + Fe²⁺(aq)

Explanation:

The reaction between aluminium metal with an aqueous solution of Fe³⁺ ions to produce Al³⁺ ions and Fe²⁺ ions is a redox reaction in which the aluminium metal is oxidized while the Fe³⁺ ions are reduced.

Oxidation occurs if the oxidation number of an element or ionic species increases in the positive direction whereas reduction occurs when the oxidation number of the reacting species decreases.

The oxidation number of aluminium increases from 0 to +3 whereas  the oxidation number of iron reduces from +3 to =2 in the given reaction.

In a net ionic equation, only the species participating in the reaction are shown.

The equation is given below;

Al(s) + Fe³⁺ ----> Al³⁺(aq)  + Fe²⁺(aq)

Answer:

4

Explanation:

Answer:

d

Explanation:

Answer: Non Metal

Explanation: Boron. Boron is a non metallic element and the only non-metal of the group 13 of the periodic table the elements

Answer:

The correct answer is C. Plz mark brainiest

Explanation:

Answer:

Option 3

[tex]MgCO_{3}[/tex]

Explanation:

These are the steps for empirical forumla

1) If given percentage, assume everything in grams

2) Convert those grams to moles (using specific molar mass of each unique element)

3) Divide all the moles by the smallest mole you discovered.

4) Answer will be close to a whole number for each element and that's the answer.

First step, 28.6 g Mg, 14.3 g C, 57.1 g O

Second step:

28.6/24.305 = 1.1767 Mg

14.3/12.01= 1.1907 C

57.1/16.00 = 3.5688 O

Third step:

1.1767/1.1767 = 1 Mg

1.1907//1.1767 ~ 1 C

3.5688/1.1767 ~ 3 O

Put everything together you get!

[tex]MgCO_{3}[/tex]

The empirical formula for the compound is:

C. [tex]MgCO_3[/tex].

A chemical formula showing the simplest ratio of elements in a compound rather than the total number of atoms in the molecule.

Given:

28.6 g Mg, 14.3 g C, 57.1 g O

In order to determine empirical formula we will divide mass of each given  element with the molar mass of the respective element.

[tex]\frac{28.6}{24.305} = 1.1767 Mg[/tex]

[tex]\frac{14.3}{12.01}= 1.1907 C[/tex]

[tex]\frac{57.1}{16.00} = 3.5688 O[/tex]

Dividing each mass with the lowest mass:

[tex]\frac{1.1767}{1.1767 } = 1 Mg[/tex]

[tex]\frac{1.1907}{1.1767 } = 1 C[/tex]

[tex]\frac{3.5688}{1.1767} =3 O[/tex]

Thus, the empirical formula for the compound is [tex]MgCO_3[/tex].

Therefore, option C is correct.

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Answer:

1. Metal.

Electrical wires are used to conduct electricity. Electrons have to flow through the wires in order to run the circuit. Only metals provide delocalized electrons that are free to move.

2. Metals, (usually)

Door handles should be strong that doesn't break easily. Metals are durable and corrosion resistant. Some metal alloys (like brass) are also found to be self-disinfecting.

3. Metals.

Radiators are usually used for emitting heat. Metals are good conductors of heat, which makes them great for making radiators.

4. Metals, (usually)

Most metals used for making chemical cupboard shelves are corrosion resistant, which causes less damage when chemical was spilled.

Answer:

1.Electrical wires - metals

They r used to conduct and transfer electricity from one place to another and therefor need to be made of metals [like copper] as they hv high electrical conductivity

Door handles - metals

They need to be corrosion resistant so dat they last longer and also there r smooth which makes it easier to hold them.

3.Radiator - metals

They r used for heat transformation and therefore they need to be made of metals as they hv high thermal conductivity [heat conductivity]

4.Shelves in the chemical cupboard - non metals

They need to be made of non metals as metals r reactive to chemicals and holes can be formed on them if a drop or two of chemicals fall on them.

Hope this helps....

Answer:

Option D. For every mole of iron oxide consumed, two moles of iron are produced.

Explanation:

The balanced equation for the reaction is given below:

Fe2O3 + 3CO —> 2Fe + 3CO2

From the balanced equation above,

1 mole of iron oxide, Fe2O3 reacted with 3 moles of carbon monoxide, CO to produce 2 moles of iron, Fe and 3 moles of carbon dioxide, CO2.

Thus, with a careful observation of the equation, we can conclude that for every 1 mole of iron oxide, Fe2O3 consumed, 2 moles of iron, Fe are produced.

Answer:

b-Mg

d-Ca

Explanation:

all the group two metals have oxidation of 2

Answer:

Calcium , Magnesium

Explanation:

APEX

Answer:

c) They have different charges but the same mass.

Explanation:

The atoms have a different charge from each other because one atom has one more electron than the other. They have the same mass because the number of protons and neutrons are the same in both atoms.

The given atoms have different charges and masses. So the correct option is D.

The amount of matter that makes up an element's atom, or atomic mass. It is stated as a multiple of 1.992646547 × 10⁻²³ grams, which is equal to one-twelfth of the mass of the carbon-12 atom, which has an atomic mass of 12 units. One atomic mass unit (amu), on this scale, is equal to 1.660539040 × 10⁻²⁴ grams. The dalton (Da) is another name for the atomic mass unit that honors the English chemist John Dalton.

The total mass of the protons, neutrons, and electrons that make up an atom is a little bit less than the observable atomic mass. According to an equation, the energy produced during the combination of these particles is converted into binding energy, which equals the product of the mass (m) spent and the square of the velocity of light in vacuum (c), or E = mc². This discrepancy is known as the mass defect.

Therefore the correct option is D.

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Answer:

a. 1,2,and 3.

Explanation:

When something turns liquid, e.g. metal, you need to heat it. When something turns gas, e.g. water, you need to heat it. And when something goes directly from solid to gas, e.g. dry ice, carbon dioxide, you need to add heat to it. hope this helps! Please mark brainiest.

Answer:

50.45679

Explanation:

mass of 1 mole(6.02 x 10^23atoms) of copper: 63.546g

so,

63.546g x 4.78 x 10^23 / 6.02 x 10^23 = 50.45679g (you could round this to the nearest decimal if u wish so)

Answer:

Its B

Explanation:

The answer above this one is right.

The strong acid and strong base has high rate constant of dessociation.   Weak acid and base are the one whose rate constant for the dissociation is low, they do not dissociate readily in water. Therefore the strongest base among all is NaOH

Acid is a solution which releases H⁺ hydrogen ion when dissolved in water. Base are the solution which relaeases hydroxide ion OH⁻ ion when dissolved in water

According to our question we are given four solutions HCl, NaOH, NH₃, H₃CO₃. Out of which HCl and H₃CO₃ are the acids as they release hydrogen ion in water. NaOH and NH₃ are base.Out of  which NaOH is the one which readily give hydroxide ion when dissolved in water

Therefore the strongest base among HCl, NaOH, NH₃, H₃CO₃  is NaOH

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Answer:

1) The full electron configuration for phosphorus is 1s²2s²2p⁶3s²3p

2) Phosphorus is paramagnetic

Explanation:

1) To write the electron configuration, we follow the electron filling order, that is starting from 1s, to 2s, 2p, 3s, 3p, 3d, 4s, 4p, 4f, 5s, 5p, 5d, 6s till the electrons are all accounted for (up to 58)

We note that the s orbitals can each take two electrons while the p orbital can take 6 electrons and the d orbital can take 10 electrons

The electron configuration chart for phosphorus, P, is given as follows;

1s²2s²2p⁶3s²3p.

2) Diamagnetism is the temporary magnetism is the magnetism of a material that exists in the presence of a magnetic field due to a a change in the atomic electron orbital motion

Paramagnetism is a magnetism in which a material is weakly attracted by an applied external magnetic field such that there is induced magnetism in the applied magnetic field direction

Paramagnetic materials have have unpaired electrons that give them permanent magnetic moments in the absence of an applied magnetic field as such unpaired electrons are termed paramagnetic electrons and atoms that have one or more unpaired electrons are paramagnetic

Phosphorus, with the 3 partially filled p orbitals have 3 unpaired electrons in their outermost shell giving them the overall properties of a paramagnetic materials.

Answer:

4,3,2

Explanation:

if you balance a chemical equation that is the correct coefficients to be placed in the blank space

Answer:

Coefficients = { 4, 3, 2 }

Explanation:

The previous answer is correct, but I want to show you how to balance this chemical reaction. First take a look at the number of each element present in the reactant and product side -

Reactant                        |                         Product

Aluminum = 1                                          Aluminum = 2

Oxygen = 2                                             Oxygen = 3

As you can see, if you were to double the aluminum on the reactant side, the reactant and product side with respect to aluminum would be balanced. 2 and 3 share a least common multiple of 6, so if we were to triple the amount of oxygen on the reactant side and double the amount of oxygen on the product side - either side would be balanced!

Now there is one default in this. The number of aluminum and oxygen on the product side are present as the same compound. Let us say we were to still triple the amount of oxygen on the reactant side and double the amount of oxygen on the product side. That would satisfy the oxygens. The chemical equation would then be as such -

Al + 3O2 -----> 2Al2O3

Now let us balance the number of aluminums on either side. There is 1 aluminum on the reactant side, with respect to 4 aluminums on the product side. The coefficient of aluminum on the reactant side should thus be four -

4Al + 3O2 -----> 2Al2O3

Coefficients = { 4, 3, 2 }

Answer:

The answer is explained below

Explanation:

The question is not complete.

The correct question should be like:

Which of the measurement contain three significant figure?

500

395

0.001

0.00100

1 × 10⁻³

5 × 10²

Answer:

The following are rules applied when considering significant figures:

i) All digits are significant excluding zero. E.g of significant digits are 1,2,3,4,5,6,7,8,9

ii) Any zero that appear within or after non zero digits are significant e.g. 200, 1004, 500009

iii) Zeros before non zero digits are not significant. An example shows significant digits bolded 001,  0.0012, 001.56

iv) Zeros that come after non zero digits are significant even if the number is in decimal form. An example shows significant digits bolded 1000,  0.001200, 001.5600

Therefore:

500: It contains three significant digits

395: It contains three significant digits

0.001:  It contains only one significant digits

0.00100: It contains three significant digits

1 × 10⁻³: 1 × 10⁻³ = 0.001.  It contains only one significant digits

5 × 10²: 5 × 10² = 500. It contains three significant digits

The measurements that contain three significant figure are 500, 395, 0.00100 and 5 × 10²

Answer:

0.01836 M

Explanation:

Again the reaction equation is;

Fe(s) + Mn2+(aq) → Fe2+(aq) + Mn(s)

E°cell= 0.77 V

Ecell= 0.78 V

[Mn2+] = 0.040 M

[Fe2+] = the unknown

n=2

From Nernst's equation;

Ecell= E°cell- 0.0592/n log Q

0.78= 0.77 - 0.0592/2 log [Fe2+] /[0.040]

0.78-0.77= - 0.0592/2 log [Fe2+] /[0.040]

0.01/ -0.0296= log [Fe2+] /[0.040]

-0.3378= log [Fe2+] /[0.040]

Antilog(-0.3378) = [Fe2+] /[0.040]

0.459= [Fe2+] /[0.040]

[Fe2+] = 0.459 × 0.040

[Fe2+] = 0.01836 M

The Fe ion concentration in the galvanic cell has been 0.0186 M.

The Nernst equation has been used for the determination of the voltage of the galvanic cell.

It can be given as:

[tex]\rm E_c_e_l_l\;=\;E_0\;-\;\dfrac{0.059}{n}\;\times\;log\;\dfrac{[Fe^+]}{[Mn^2^+]}[/tex]

where, n = number of electrons transfer = 2

[tex]\rm E_0[/tex] = initial voltage = 0.77 V

[tex]\rm E_c_e_l_l[/tex] = cell voltage = 0.78 V

Iron ion concentration = 0.040 M

Susbstituting the values:

0.78 = 0.77 - [tex]\rm \dfrac{0.059}{2}\;\times\;log\;\dfrac{[Fe^2^+]}{[0.040]}[/tex]

0.78 - 0.77 = -0.0296 [tex]\rm \times\;log\;\dfrac{[Fe^2^+]}{[0.040]}[/tex]

-0.03378 = [tex]\rm log\;\dfrac{[Fe^2^+]}{[0.040]}[/tex]

antilog (-0.03378) = [tex]\rm \dfrac{[Fe^2^+]}{0.040}[/tex]

Iron ion concentration = 0.0186 M

Thus, the Fe ion concentration in the galvanic cell has been 0.0186 M.

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Answer:

D. all of the above.

Explanation:

The kinetic-molecular theory of gases suggests that; the particles of a gas move independently of each other, the particles in a gas move rapidly, the particles in a gas are far apart.

Hope it helps.

Answer:

sulfuric acid and potassium hydroxide is actually the answer, not the girls above me.

Explanation:

EDU SAID SO

The two compounds are used in batteries are sulfuric acid and potassium hydroxide.

The chemicals present in a different type of batteries are sodium chloride, sulfuric acid, hydrochloric acid, chloric acid, potassium nitrate, nitric acid, sodium hydroxide, magnesium hydroxide and sodium acetate.

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Answer:

it is perpendicular to the surfaces that rub together

The Statement that describe friction is perpendicular to the surfaces that rub together.

Friction is the force or resistance that act on a body in motion or when one body rub against each other.

It is the gliding and sliding that occur in a body in motion.

Therefore, The Statement that describe friction is perpendicular to the surfaces that rub together.

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Answer:

A wave with small amplitude.

Explanation:

Amplitude us inversely proportional to energy so the smaller the amplitude, the higher the energy.

Hope it helps.

The correct answer is a wave with a very large amplitude.

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Answer: a carboxylic acid and an amine

Explanation: just took the test

Four atoms—Carbon (C), Oxygen (O), Hydrogen (H), and Nitrogen (N)—make up the molecule in question. Alkyl halides and carboxylic acids are two functional groups that may be distinguished from the molecule's structure.

A halogen atom (such a chlorine, bromine, or iodine atom) is joined to a carbon atom to form the functional group known as an alkyl halide. The C is joined to a R group, which is another name for a carbon-based group, in this molecule.

This shows that it is an alkyl halide since the C is joined to a halogen atom. A functional group called a carboxylic acid is made up of an oxygen atom and a hydrogen atom that are double-bonded to a carbon atom.

This molecule has Given that the two oxygen atoms are connected to the carbon atom and the hydrogen atom is bound to the oxygen atom, the chemical formula C O O H denotes a carboxylic acid.

The molecule in issue therefore comprises an alkyl halide as well as a carboxylic acid. No amine and ester, no aldehyde and carboxylic acid, and no amine and alcohol are present.  

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Answer:

8

Explanation:

Since Xe (xenon) is a noble gas, it has 8 valence electrons. It's outer shell is full and it is a stable element and doesn't like to react. Therefore, since the electron dot diagram is about valence electrons, 8 would be your answer.

The time taken to complete the reaction is 179 seconds.

Rate of reaction is the time taken for a reaction to attain completion. From the data presented, we have;

Initial concentration  = No

Final concentration = No - (0.8No) = 0.2No

rate constant = 9.2 x 10−3 s−1

time taken = t

Given that;

N =Noe^-kt

0.2No =Noe^-( 9.2 x 10−3 t)

0.2 = e^-( 9.2 x 10−3 t)

ln(0.2) = 9.2 x 10−3 t

t = ln(0.2)/-9.2 x 10−3

t = -1.609/-0.009

t= 179 seconds

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