All categories

3 years ago

Write a balanced chemical equation for each of the following.

Chemistry

2 answers:

Anettt [7]3 years ago

5 0

Balanced chemical equation :

1. 4HCl (aq) + O₂ (g) ⇒ 2Cl₂ (g) + 2H₂O (l)

2. C₈H₂₀ (l) + 13O₂ (g) ⇒ 8CO₂ (g) + 10H₂O (g)

3. 2NO (g) + 5 H₂ (g) ⇒ 2NH₃ (g) + 2H₂O (g)

4. Fe₂O₃ (s) + 3CO (g) ⇒ 2Fe (s) + 3CO₂ (g)

<h3>Further explanation </h3>

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.

2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product

3. Select the coefficient of the substance with the most complex chemical formula equal to 1

For gas combustion reaction which is a reaction of hydrocarbons with oxygen produces CO₂ and H₂O (water vapor). can use steps:

Balancing C, H and the last O

1. HCl (aq) + O₂ (g) ⇒ Cl₂ (g) + H₂O (l)

Suppose we give a coefficient of 1 for HCl

HCl (aq) + aO₂ (g) ⇒ bCl₂ (g) + cH₂O (l)

number of H atoms: left 1, right 2c -> 2c = 1-> c = 1/2

number of Cl atoms: left 1, right 2b ---> 2b = 1 ----> b = 1/2

number of O atoms: left 2a, right c ---> 2a = c ---> 2a = 1/2 ---> a = 1/4

the reaction coefficient becomes:

HCl (aq) + 1 / 4O₂ (g) ⇒ 1 / 2Cl₂ (g) + 1 / 2H₂O (l) x 4

4HCl (aq) + O₂ (g) ⇒ 2Cl₂ (g) + 2H₂O (l)

2. C₈H₂₀ (l) + O₂ (g) ⇒ CO₂ (g) + H₂O (g)

Suppose we give a coefficient of 1 for C₈H₂₀

C₈H₂₀ (l) + aO₂ (g) ⇒ bCO₂ (g) + cH₂O (g)

number of C atoms: left 8, right b ---> b = 8

number of H atoms: left 20, right 2c -> 2c = 20 -> c = 10

number of O atoms: left 2a, right 2b + c ---> 2a = 2b + c ---> 2a = 2.8 + 10 ---> 2a = 26 ---> a = 13

the reaction coefficient becomes:

C₈H₂₀ (l) + 13O₂ (g) ⇒ 8CO₂ (g) + 10H₂O (g)

3. NO (g) + H₂ (g) ⇒ NH₃ (g) + H₂O (g)

Let's say we give a coefficient of 1 for NH₃

aNO (g) + bH₂ (g) ⇒ NH₃ (g) + cH₂O (g)

number of N atoms: left a, right 1 ---> a = 1

number of O atoms: left a, right c ---> a = c = 1

number of H atoms: left 2b, right 3 + 2c -> 2b = 3 + 2.1 ---> 2b = 5 -> b = 5/2

the reaction coefficient becomes:

NO (g) +5/2 H₂ (g) ⇒ NH₃ (g) + H₂O (g) x2

2NO (g) +5 H₂ (g) ⇒ 2NH₃ (g) + 2H₂O (g)

4. Fe₂O₃ (s) + CO (g) ⇒ Fe (s) + CO₂ (g)

Let's say we give a coefficient of 1 for Fe₂O₃

Fe₂O₃ (s) + aCO (g) ⇒ bFe (s) + cCO₂ (g)

number of Fe atoms: left 2, right b ---> b = 2

number of O atoms: left 3 + a, right 2c ---> 3 + a = 2c

number of C atoms: left a, right c -> a = c -> we put in the equation the number of atoms O

3 + c = 2c ---> 3 = c = a

the reaction coefficient becomes:

Fe₂O₃ (s) + 3CO (g) ⇒ 2Fe (s) + 3CO₂ (g)

<h3>Learn more </h3>

the combustion of octane in gasoline

brainly.com/question/8175791

brainly.com/question/897044

hydrogen and excess oxygen

brainly.com/question/1405182

astraxan [27]3 years ago

3 0

These are four questions and four complete answers

Since the answer is over 5,000 characters, the full answers are in the attached file.

Answers:

A) 4HCl (aq) + O₂(g) → 2Cl₂ (g) + 2H₂O (l)

B) C₈H₂₀ (l) + 13O₂(g) → 8CO₂ (g) + 10H₂O (g)

C) 2NO (g) + 5H₂(g) → 2NH₃ (g) + 2H₂O (g)

D) Fe₂O₃ (s) + 3CO(g) → 2Fe (s) + 3CO₂ (g)

Explanation:

A) Aqueous hydrogen chloride reacts with oxygen gas to form chlorine gas and liquid water.

1) Word equation:

Aqueous hydrogen chloride + oxygen gas → chlorine gas + liquid water

2) Chemical equation:

HCl (aq) + O₂(g) → Cl₂ (g) + H₂O (l)

3) Explanation of each term:

HCl (aq):

* The most electronegative element (Cl) is written to the right, and the least electronegative element (H) is written to the left.

* The abbreviation aq inside the parenthesis is used to describe the aqueous phase of the compound.

O₂ (g)

* Oxygen is a diatomic molecule, so you use the subscript 2 to indicate the two atoms in the molecule.

* The abbreviation (g) indicates the gas phase.

Cl₂ (g)

* Chlorine is a diatomic gas, so you use the subscript 2 to indicate the two atoms in the molecule.

* The abbreviation (g) indicates the gas phase.

H₂O (l)

* The most electronegative element (O) is written to the right and the least electronetative element (H) is written to the left.

* The subscript 2 next to H indicates that there are two atoms of hydrogen, while the lack of subscript next to O indicates that there is one atom of oxygen, in each molecule of water.

* The abbreviation (l) indicates the liquid phase of water.

4) Balancing

To obey the mass conservation law, the number of each kind of atoms in the reactant side must equal the number of the same kind of atom in the product side. Hence, you have to introduce the necessary coefficients to balance the equation:

4HCl (aq) + O₂(g) → 2Cl₂ (g) + 2H₂O (l)

Count each kind of atoms on each side to check the equation is balanced:

Element left side right side

H 4 2×2 = 4

Cl 4 2×2 = 4

O 1×2 = 2 2×1 = 2

Conclusion: the balanced chemical equation is

4HCl (aq) + O₂(g) → 2Cl₂ (g) + 2H₂O (l)

B) Liquid octane reacts with oxygen gas to form carbon dioxide gas and water vapor.

1) Word equation:

liquid octane + oxygen gas → carbon dioxide gas + water vapor

2) Chemical equation:

C₈H₂₀ (l) + O₂(g) → CO₂ (g) + H₂O (g)

3) Explanation of each term:

C₈H₂₀ (l)

* This is an organic compound. An alkane. This name follows IUPAC rules.

* The abbreviation (l) describes the liquid phase of the compound.

O₂ (g)

* Oxygen is a diatomic molecule, so you use the subscript 2 to indicate the two atoms in the molecule.

* The abbreviation (g) indicates the gas phase.

CO₂ (g)

* Oxygen, O, is the most electronegative, and carbon (C) is the least electronegative.

* The subscript 2 next to O atom, indicates that there are two atoms of oxygen in the molecule. There is only one atom of carbon (no subscript is added).

* The abbreviation (g) indicates the gas phase.

H₂O (g)

* The most electronegative element (O) is written to the right and the least electronetative element (H) is written to the left.

* The subscript 2 next to H indicates that there are two atoms of hydrogen. The lack of subscript next to O indicates that there is one atom of oxygen, in each molecule of water.

* The abbreviation (g) indicates the vapor (gas) phase of water.

4) Balancing

C₈H₂₀ (l) + 13O₂(g) → 8CO₂ (g) + 10H₂O (g)

Count each kind of atoms on each side to check the equation is balanced:

Element left side right side

C 8 8

H 20 10×2 = 20

O 13×2 = 26 8×2 + 10 = 26

Conclusion: the balanced chemical equation is

C₈H₂₀ (l) + 13O₂(g) → 8CO₂ (g) + 10H₂O (g)

Since the answer is over 5,000 characters the next answers are in the attached file.

Download docx

You might be interested in

Which has a lower electronegativity: sodium or rubidium?

sammy [17]

Answer:

sodium has a lower electronegativity:)

Explanation:

6 0

1 year ago

Magnesium unites completely and vigorously with oxygen to form magnesium oxide, which contains 60% magnesium by weight. If 1.00

Dmitry_Shevchenko [17]

Answer:

After the reaction, there will 0.60 g of magnesium oxide and 0.25 g of oxygen gas present in the tube

Explanation:

Equation of the reaction between magnesium and oxygen is given as follows:

2Mg(s) + O₂(g) ---> 2MgO(s)

From the equation of reaction, 2 moles of magnesium reacts with i mole of oxygen gas to produce 1 mole of magnesium oxide

molar mass of magnesium is 24.0 g; molar mass of oxygen gas = 32.0 g; molar mass of magnesium oxide = 40.0 g

Therefore 24 g of magnesium reacts with 32 g of oxygen gas

I.00 g of magnesium will react with (24.0 / 32.0) * 1.00 g of oxygen = 0.75 g of oxygen gas.

Therefore, magnesium is the limiting reagent. Once it is used up, the reaction will stop and the excess oxygen will be left in the tube together with the product, magnesium oxide.

mass of excess oxygen = 1.00 - 0.75 = 0.25 g

mass of magnesium oxide formed = (24.0 / 40.0 g) * 1 = 0.60 g

4 0

2 years ago

If water were a nonpolar molecule, how would its properties be different?

netineya [11]

If water was nonpolar, life as it exists now would be impossible. Water is the means by which ionic substances ( Fe^3+, Na^+, Ca^2+, K^+, etc) and polar molecules are distributed around and in the cells of organisms.
Water is a major contributor to erosion of mountains because of its polar nature. It is able to dissolve almost all minerals because of its attraction for the positive and negative parts of the minerals that it encounters. 
If it was nonpolar, it would not exist in the solid and liquid state on earth. It is the attraction of the oppositely charged ends of different water molecules that makes it assume the liquid and solid state under the temperature ranges found on earth.

5 0

2 years ago

If the sodium oxide (Na2O) in soda-lime glass was replaced by potassium oxide (K2O), this would result in . . .

matrenka [14]

It would result in a explosion

6 0

1 year ago

Write a balanced nuclear equation for the following: The nuclide astatine-218 undergoes alpha emission to give bismuth-214

galina1969 [7]

Answer:

$^{218}_{85}At\rightarrow ^{214}_{83}Bi+^{4}_{2}He$

Explanation:

Hello there!

In this case, since the radioactive reaction for the alpha emission of astatine-218 to bismith-214 involve the release of a helium atom as shown below:

$^{218}_{85}At\rightarrow ^{214}_{83}Bi+^{4}_{2}He$

Whereas the atomic number decreases by 2 and the mass number by 4 in agreement to the release of the Helium atom.

Regards!

7 0

2 years ago