Biology: Which of the following is a correctly balanced equation?

Which of the following is a correctly balanced, №9996943, 24.03.2021 09:56

Chemistry

Mass of Mg (g): 0.2000 Mass of oxide (g): 0.3317 1. Determine the empirical formula of the oxide of magnesium. (Think carefully about the precision of each mass that you measured before you do this calculation. How many significant figures are justified for each mass?) 2. Write the correctly balanced chemical equation for the reaction of magnesium with molecular oxygen. 3. Write the correctly balanced chemical equation for the reaction of magnesium with molecular nitrogen. 4. Write the correctly balanced chemical equation for the reaction of magnesium

Step-by-step answer

P Answered by Specialist

1. Empirical formula is MgO

2. 2Mg + O₂ --> 2MgO

3. 3Mg + N₂ ---> Mg₃N₂

4. Mg₃N₂ + 6H₂O > 3Mg(OH)₂ + 2NH₃

5. Mg(OH)₂ ---> MgO + H₂O

Explanation:

1. Empirical formula:

mass of magnesium oxide = 0.3327 g; mass of magnesium = 0.2000 g

mass of oxygen = 0.3317 g - 0.2000 g = 0.1317 g

molar mass of magnesium = 24, molar mass of oxygen = 16

molar ratio of magnesium to oxygen is then calculated;

magnesium = 0.2000/24 = 0.0083 : oxygen = 0.1317/16 = 0.0082

magnesium = 0.0083/0.0082 = 1 : oxygen = 0.0082/0.0082 = 1

molar ratio of magnesium to oxygen = 1 : 1

Therefore, empirical formula is MgO

2. The reaction of magnesium with molecular oxygen produces magnesium oxide as shown by the equation below:

2Mg + O₂ --> 2MgO

3. The reaction of magnesium with molecular nitrogen produces magnesium nitride as shown by the equation below:

3Mg + N₂ ---> Mg₃N₂

4. The reaction of magnesium nitride with water produces magnesium hydroxide and ammonia gas as shown by the equation below:

Mg₃N₂ + 6H₂O > 3Mg(OH)₂ + 2NH₃

5. The products of the reaction of heating magnesium hydroxide are magnesium oxide and water as shown by the equation below:

Mg(OH)₂ ---> MgO + H₂O

Chemistry

Mass of Mg (g): 0.2000 Mass of oxide (g): 0.3317 1. Determine the empirical formula of the oxide of magnesium. (Think carefully about the precision of each mass that you measured before you do this calculation. How many significant figures are justified for each mass?) 2. Write the correctly balanced chemical equation for the reaction of magnesium with molecular oxygen. 3. Write the correctly balanced chemical equation for the reaction of magnesium with molecular nitrogen. 4. Write the correctly balanced chemical equation for the reaction of magnesium

Step-by-step answer

P Answered by Specialist

1. Empirical formula is MgO

2. 2Mg + O₂ --> 2MgO

3. 3Mg + N₂ ---> Mg₃N₂

4. Mg₃N₂ + 6H₂O > 3Mg(OH)₂ + 2NH₃

5. Mg(OH)₂ ---> MgO + H₂O

Explanation:

1. Empirical formula:

mass of magnesium oxide = 0.3327 g; mass of magnesium = 0.2000 g

mass of oxygen = 0.3317 g - 0.2000 g = 0.1317 g

molar mass of magnesium = 24, molar mass of oxygen = 16

molar ratio of magnesium to oxygen is then calculated;

magnesium = 0.2000/24 = 0.0083 : oxygen = 0.1317/16 = 0.0082

magnesium = 0.0083/0.0082 = 1 : oxygen = 0.0082/0.0082 = 1

molar ratio of magnesium to oxygen = 1 : 1

Therefore, empirical formula is MgO

2. The reaction of magnesium with molecular oxygen produces magnesium oxide as shown by the equation below:

2Mg + O₂ --> 2MgO

3. The reaction of magnesium with molecular nitrogen produces magnesium nitride as shown by the equation below:

3Mg + N₂ ---> Mg₃N₂

4. The reaction of magnesium nitride with water produces magnesium hydroxide and ammonia gas as shown by the equation below:

Mg₃N₂ + 6H₂O > 3Mg(OH)₂ + 2NH₃

5. The products of the reaction of heating magnesium hydroxide are magnesium oxide and water as shown by the equation below:

Mg(OH)₂ ---> MgO + H₂O

Chemistry

Astudent balanced the chemical equation mg + o2 →mgo by writing mg + o2 → mgo2. was the equation balanced correctly? explain your answer. if the equation was not balanced correctly, write the correctly balanced equation.

Step-by-step answer

P Answered by PhD

9

Explanation:

Charges on both magnesium and oxygen is 2. Though opposite in sign, they have equal charges so, both of them will be cancelled by each other.

As a result, formula of magnesium oxide is MgO and not $MgO_{2}$ .

The student write the equation as $Mg + O_2 \rightarrow MgO_2$ , it is not correct.

Therefore, given equation will be balanced as follows.

$2Mg + O_{2} \rightarrow 2MgO$

Since, number of atoms on both reactant and product side are equal. Hence, this equation is completely balanced.

Chemistry

Astudent balanced the chemical equation mg + o2 →mgo by writing mg + o2 → mgo2. was the equation balanced correctly? explain your answer. if the equation was not balanced correctly, write the correctly balanced equation.

Step-by-step answer

P Answered by PhD

9

Explanation:

Charges on both magnesium and oxygen is 2. Though opposite in sign, they have equal charges so, both of them will be cancelled by each other.

As a result, formula of magnesium oxide is MgO and not $MgO_{2}$ .

The student write the equation as $Mg + O_2 \rightarrow MgO_2$ , it is not correct.

Therefore, given equation will be balanced as follows.

$2Mg + O_{2} \rightarrow 2MgO$

Since, number of atoms on both reactant and product side are equal. Hence, this equation is completely balanced.

Chemistry

In the following reaction, when the equation is correctly balanced, what is the correct coefficient for sodium chloride? pb(no3)2(aq) + nacl(aq) → pbcl2 (s) + nano3(aq) in the following reaction, when the equation is correctly balanced, what is the correct coefficient for sodium chloride? pb(no3)2(aq) + nacl(aq) → pbcl2 (s) + nano3(aq) 1 2 3 4 5

Step-by-step answer

P Answered by PhD

4

Thus the correct coefficient for sodium chloride is 2.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical reaction is:

$Pb(NO_3)_2(aq)+2NaCl(aq)\rightarrow PbCl_2(s)+2NaNO_3(aq)$

Thus the correct coefficient for sodium chloride is 2.

Chemistry

In the following reaction, when the equation is correctly balanced, what is the correct coefficient for sodium chloride? pb(no3)2(aq) + nacl(aq) → pbcl2 (s) + nano3(aq) in the following reaction, when the equation is correctly balanced, what is the correct coefficient for sodium chloride? pb(no3)2(aq) + nacl(aq) → pbcl2 (s) + nano3(aq) 1 2 3 4 5

Step-by-step answer

P Answered by PhD

4

Thus the correct coefficient for sodium chloride is 2.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical reaction is:

$Pb(NO_3)_2(aq)+2NaCl(aq)\rightarrow PbCl_2(s)+2NaNO_3(aq)$

Thus the correct coefficient for sodium chloride is 2.

Chemistry

Which of the following is a correct and balanced equation showing the reaction of calcium and oxygen? (while several of the equations may be balanced, only one has the correct products and reactants as well as being correctly balanced.) a. a. ca + o2 = cao b. b. ca + o2 = cao2 c. c. 2ca + o2 = 2cao d. d. 4ca + o2 = 2ca2o e. e. ca + o2 = ca2o 26-3.

Step-by-step answer

P Answered by Specialist

3

The correct option is: C. 2Ca + O₂ = 2CaO

Explanation:

Calcium is a s-block element, belonging to the group 2 and period 4 of the periodic table.

It is an alkaline earth metal having 2 valence electrons in its outermost s-orbital. So, calcium generally exists in +2 oxidation state in its compounds.

When calcium (Ca) reacts with oxygen (O₂), calcium oxide or quicklime (CaO) is formed.

The balanced chemical equation is: 2Ca + O₂ → 2CaO

Chemistry

Which of the following is a correct and balanced equation showing the reaction of calcium and oxygen? (while several of the equations may be balanced, only one has the correct products and reactants as well as being correctly balanced.) a. a. ca + o2 = cao b. b. ca + o2 = cao2 c. c. 2ca + o2 = 2cao d. d. 4ca + o2 = 2ca2o e. e. ca + o2 = ca2o 26-3.

Step-by-step answer

P Answered by Master

3

The correct option is: C. 2Ca + O₂ = 2CaO

Explanation:

Calcium is a s-block element, belonging to the group 2 and period 4 of the periodic table.

It is an alkaline earth metal having 2 valence electrons in its outermost s-orbital. So, calcium generally exists in +2 oxidation state in its compounds.

When calcium (Ca) reacts with oxygen (O₂), calcium oxide or quicklime (CaO) is formed.

The balanced chemical equation is: 2Ca + O₂ → 2CaO

Chemistry

A classmate has balanced the following reaction. Explain why their equation is not correctly balanced, and tell the correct way to balance the equation. 6 LiBr + 2 Fe_3(PO_4)_2 = 2 Li_3PO_4 + 3 FeBr_2

Step-by-step answer

P Answered by PhD

2

See below

Explanation:

Coefficient on Fe₃(PO₄)₂ is incorrect => such means sum of mass reactants does not equal sum mass of products. Violates Law of Conservation of Matter in chemical reactions.

Correct balance is ...

6LiBr + Fe₃(PO₄)₂ => 2Li₃PO₄ + 3FeBr₂

Chemistry

A classmate has balanced the following reaction. Explain why their equation is not correctly balanced, and tell the correct way to balance the equation. 6 LiBr + 2 Fe_3(PO_4)_2 = 2 Li_3PO_4 + 3 FeBr_2

Step-by-step answer

P Answered by PhD

2

See below

Explanation:

Coefficient on Fe₃(PO₄)₂ is incorrect => such means sum of mass reactants does not equal sum mass of products. Violates Law of Conservation of Matter in chemical reactions.

Correct balance is ...

6LiBr + Fe₃(PO₄)₂ => 2Li₃PO₄ + 3FeBr₂

Which of the following is a correctly balanced equation?

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