When the following equation is balanced, what is the coefficient of oxygen?
C2H5OH() + O2(g) --> CO2(g) + H2O()

Answers

Answer 1

Answer:

The answer is 3

C2H5OH + O2 CO2 +H2O (unbalanced)

C2H5OH +3O2(g). 2CO2(g)+3H2O(balanced)

Answer 2

According to the balanced chemical equation, C₂H₅OH + 3 O₂[tex]\rightarrow[/tex] 2 CO₂ + 3 H₂O the coefficient of oxygen is three.

What is chemical equation?

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Related Questions

One of the methods that scientists can use to determine the toxicity of a chemical compound is to perform a dose-response analysis.

a. True
b. False

Answers

Answer:

a. True

Explanation:

Hello there!

In this case, since the dose-response method is crucial concept in toxicology as it exhibits the result of exposures to toxic chemical compounds with changes in body functions or health, this statement is a. True , as this analysis is understood by means of the relationship -the higher the dose, the more severe the response-, and of course, it is based on observed data from controlled experiments in animal, human clinical, or cell studies, in the light of the determination of the toxicity of the analyzed chemical.

Regards!

Which statement can be made about the above passage

Answers

Answer:

Explanation:

whats the qustion?

need this ASAP
Which of these must be FALSE, in order for evolution by natural selection to occur?

A. Variation between individuals exists in a population.

B. Particular variations of traits are passed on from one generation to the next.

C. Resources are limited, leading to competition within the population.

D. The particular traits present in one generation have no effect on traits in the next generation.

thank you :D

Answers

I think answer should be d. Please give me brainlest let me know if it’s correct or not okay thanks bye have a great day

CH4 Structural formulas​

Answers

Explanation:

Methane = CH4

(formula)

A chemist mixed two substances together: a blue powder with no smell and a colorless liquid with a strong smell. Their repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right. Is the ending substance the same substance as the blue powder? What happened to the atoms of the starting substances when the ending substances formed? Be sure to explain your answers to both of these questions.​

Answers

Answer:

fouse the fact sheet it helps more

During a lab experiment performed at STP conditions, you prepare HCl by reacting 100. ml of Cl2 gas with an excess of H2 gas.
How many ml of a solution of Ba(OH)2 0.230M do you need to neutralize all the HCl produced?

Answers

Answer:

19.4 mL Ba(OH)2

Explanation:

H2(g) + Cl2(g) --> 2HCl(aq) (make sure this equation is balanced first)

At STP, 1 mol gas = 22.4 L gas. Use this conversion factor to convert the 100. mL of Cl2 to moles.

0.100 L Cl2 • (1 mol / 22.4 L) = 0.00446 mol Cl2

Use the mole ratio of 2 mol HCl for every 1 mol Cl2 to find moles of HCl produced.

0.00446 mol Cl2 • (2 mol HCl / 1 mol Cl2) = 0.00892 mol HCl

HCl is a strong acid and Ba(OH)2 is a strong base so both will completely ionize to release H+ and OH- respectively. You need 0.00892 mol OH- to neutralize all of the HCl. Note that one mole of Ba(OH)2 contains 2 moles of OH-.

0.00892 mol OH- • (1 mol Ba(OH)2 / 2 mol OH-) • (1 L Ba(OH)2 / 0.230 M Ba(OH)2) = 0.0194 L = 19.4 mL Ba(OH)2

The first step in answering this reaction is to write down the required reaction equations and then answer the questions from stoichiometry(mass-mole relationship).

The first equation is;

[tex]H2(g) + Cl2(g) ------->2HCl(g)[/tex]

The second equation is

[tex]2HCl(g) + Ba(OH)2(aq) -------> BaCl2(aq) + 2H2O(l)[/tex]

From stoichiometry;

1ml = 1cm3

Since hydrogen is in excess, chlorine is the limiting reactant

1 mole of Cl2 occupies 22400cm3

x moles of Cl2 occupies 100cm3

x = 1 * 100/22400

x = 0.00446 moles of Cl2

According to the reaction equation;

1 mole of Cl2 yields 2 moles of HCl

0.00446 moles of Cl2 yields 0.00446 * 2/1

= 0.00892 moles of HCl

From the reaction equation;

2 moles of HCl reacts with 1 mole of Ba(OH)2

0.00892 moles of HCl reacts with 0.00892 * 1/2 = 0.00446 moles of Ba(OH)2

Since 0.00446 moles of Ba(OH)2 reacted

number of moles = concentration * volume

number of moles =  0.00446 moles

concentration = 0.230M

Let the volume in ml be V

0.00446 =  0.230 * V/1000

V = 0.00446 * 1000/ 0.230

V = 19.39 ml

Volume in ml = 19.39 ml of Ba(OH)2

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how many moles are in 83 particles of sodium chloride?

Answers

Answer:

there are 1.4201927800478769 moles in 83 particles of sodium chloride. or 1.42 for short.

Explanation:

Physical chemistry is the bridge between physics and chemistry.

a. True
b. False

Answers

Answer:

Im gonna go with.... B. False

________________________________

*rate this answer and say thanks please!

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Yes it is true. That physical chemistry is a bridge between physics and chemistry. Because here we study the physical behaviours of the chemical reactions.

Write
a word equation for the reaction in which hydrogen and oxygen react to form water ​

Answers

Hydrogen + Oxygen → Water.

Please please help me please please

Answers

Answer: 1. A, 2.B, 3. D, 4. B, 5. C

Explanation:

i have P.E. too lol have a great day!

What heats up faster but loses heat faster?


-Water
-Air
Or
Land

Answers

The answer is land because land absorbs heat more quickly but it also loses heat more quickly. And it is not water because water is a low conductor of heat and water has to lose more energy in order for the temperature to decrease. And air could not be the answer.

Structure of benzylidene diacetate....​

Answers

Explanation:

Benzal .....

Molecular Formula: C11H12O4

PLS HELP AND ANSWER QUICK PLZ HELP

Answers

Answer:

i tried

Explanation:

1-A divergent boundary occurs when two tectonic plates move away from each other

2-A transform plate boundary occurs when two plates slide past each other

3-A convergent boundary is when two plates come together

4- I don't know

help out here plzzzzzzzzzzzzz

Answers

Answer:

Chromosomes are duplicated in the "s phase" of interphase.

what is the molar mass of aspartic acid​

Answers

What is the molar mass of aspartic acid, C404H7N?

ANSWER: 133g/mol

The molar mass of aspartic acid is 133.05g/mol.

What is molar mass?

The molar mass is the mass per unit amount of substance of a given chemical entity. It is denoted by a symbol M. The SI unit of molar mass is kg/mol.

What is aspartic acid?

Aspartic acid is one of the building-block of amino acids which is responsible for synthesizing proteins and regulating hormones in the human body.

The chemical formula of aspartic acid is C4H7NO4.

Atomic mass of C = 12.011u, H = 1.007u, N = 14.006u, O = 16u

Molar mass of C4H7NO4 = 4(12.011)+7(1)+14.006+4(16)

                 = 48.044+7+14.006+64

                 = 133.05g/mol

Hence, the molar mass of aspartic acid is 133.05g/mol.

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A 16.4 g sample of calcium chloride is dissolved in enough water to make 750.0 mL of solution. Calculate the molarity of calcium chloride in this solution. plz help!!!

Answers

SIMP FOR LEVI AKRAMEN

The molarity is an important method to calculate the concentration of a solution. The molarity of calcium chloride of 16.4 g in 750.0 mL of solution is 0.196 mol L⁻¹.

What is molarity?

The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. It is mainly employed in calculating the molarity of a binary solution. It is represented as 'M' and unit is mol L⁻¹.

The equation used to calculate the molarity is given as:

Molarity = Number of moles of the solute / Volume of the solution in litres

Molar mass of CaCl₂ = 110.98 g/mol

Given mass = 16.4 g

Number of moles = 16.4 / 110.98 = 0.147

750.0 mL = 0.75 L

Molarity = 0.147 / 0.75 = 0.196 mol L⁻¹

Thus the molarity is 0.196 mol L⁻¹.

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explain the effect of the coil of wire after it has been charged by the batteries​

Answers

The compass needle moved when the wire was connected to the battery. The important point here is that the needle is affected by the wire only when both ends of the wire are connected to the battery because only at this time is current flowing through the circuit.

in which location are there no changes in season

a north pole
B South Pole
C equator
D antártica

Answers

Answer: I'm going to say it's Antartica because the only seasons it have is summer and winter and it doesn't change.

Explanation:

what is the pH level of soda?​

Answers

Cherry Coke was found to be the next most acidic (pH of 2.522), and Coke was the third most acidic soda tested (pH of 2.525). Battery acid has a pH of 1.0. Pure water at room temperature has a pH of 7.0. The results show that a soda's acidity is not the whole story when it comes to tooth erosion.


What evidence can be used to explain the type of mutualistic relationship present between the water buffalo and frog?

Answers

Answer is yeah yeah so yeah

Bonds are formed because atoms are more stable when they have the valence shell in the electron noble gas configuration (full outer valence shell). What is the net charge of either molecular
ionic compounds?
o
А
Positive
B
Negative
O &
D
Zero-neutral

Answers

I would say answer choice A) positive after checking, hope this helps

the exact position of the electrons of an atom cannot be determined because they are in constant ___

Answers

movement
i’m pretty sure-

What resists pH change by reacting with acids and bases?

Answers

A buffer resists the change of ph. That is because a buffer is made of an acid and it’s conjugate base. This mixture will react with any solution that is added to neutralize it. If an acid is added to a buffer, the base in that buffer will react with the added acid to create water and a neutral salt. This reaction results in very little ph change

Consider 4.70 L of a gas at 365 mmHg and 20. ∘C . If the container is compressed to 2.00 L and the temperature is increased to 36 ∘C , what is the new pressure, P2, inside the container? Assume no change in the amount of gas inside the cylinder.

Answers

Answer:

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Explanation:

Suggest two observations that would be made when rubidium is added to cold water.

Answers

Answer:

1. Rubidium metal reacts very rapidly with water to form a colorless basic solution of rubidium hydroxide (RbOH) and hydrogen gas (H2).

2. Rubidium sinks because it is less dense than water. It reacts violently and immediately, with everything leaving the container. Rubidium hydroxide solution and hydrogen are formed.

Which of the following statements are true?
Question 1 options:


According to collision theory, any factor that can cause more collisions will increase the rate of reactions.


According to collision theory, factors can cause more collisions, but will not change the rate of reactions.


According to collision theory, factors that can cause more collisions have less energies than the activation energy, thus will decrease the rate of reaction.


According to the collision theory, no factors can influence reaction rates.

Answers

Answer:

c

Explanation:

factor can cause more collision and increase the rate of reaction

How many atoms are in a ring made of pure gold, Au (element 79), if there are 0.092 moles of gold in it?

Answers

Answer:

i think it wil be 567489

Explanation:

ik im right :)

4NH3 + 502 --> 4NO + 6H20
How much excess reactant is leftover after if 6.30g of ammonia react with
1.80g of oxygen?

Answers

Answer:

5.52 g

Explanation:

4NH₃ + 5O₂ → 4NO + 6H₂O

First we convert the given masses of both reactants into moles, using their respective molar masses:

6.30 g NH₃ ÷ 17 g/mol = 0.370 mol NH₃ 1.80 g O₂ ÷ 32 g/mol = 0.056 mol O₂

Now we calculate with how many NH₃ moles would 0.056 O₂ moles react, using the stoichiometric coefficients:

0.056 mol O₂ * [tex]\frac{4molNH_3}{5molO_2}[/tex] = 0.045 mol NH₃

As there more NH₃ moles than required, NH₃ is the excess reactant.

Then we calculate how many NH₃ moles remained without reacting:

0.370 mol NH₃ - 0.045 mol NH₃ = 0.325 mol NH₃

Finally we convert NH₃ moles into grams:

0.325 mol NH₃ * 17 g/mol = 5.52 g

what is the electron configuration of S and Cl?

Answers

Answer:

S is [Ne] 3s²3p⁴

Cl is [Ne] 3s² 3p⁵

Explanation:

Potassium chlorate decomposes to produce potassium chloride and oxygen gas according to the balanced equation below. If 1.00 g of potassium chlorate decomposes, and 0.500 g of solid potassium chloride is collected, what is the theoretical yield of potassium chloride and the % Yield of potassium chloride

Answers

Answer: The theoretical yield of potassium chloride is 0.596 grams and the % Yield of potassium chloride is 83.9%

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of} KClO_3=\frac{1.00g}{122.5g/mol}=0.008moles[/tex]  

[tex]2KClO_3\rightarrow 2KCl+3O_2[/tex]  

According to stoichiometry :

2 moles of [tex]KClO_3[/tex] produce= 2 moles of [tex]KCl[/tex]

Thus 0.008 moles of [tex]KClO_3[/tex] will produce=[tex]\frac{2}{2}\times 0.008=0.008moles[/tex]  of [tex]KCl[/tex]

Theoretical yield of [tex]KCl=moles\times {\text {Molar mass}}=0.008moles\times 74.5g/mol=0.596g[/tex]

% yield = [tex]\frac{\text {Actual yield}}{\text {Theoretical yield}}\times 100=\frac{0.500g}{0.596g}\times 100\%=83.9\%[/tex]

The theoretical yield of potassium chloride is 0.596 grams and the % Yield of potassium chloride is 83.9%

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