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3 years ago

NH3 + HCI —> NH4CI synthesis O decomposition O single replacement O double replacement

Chemistry

1 answer:

wlad13 [49]3 years ago

8 0

Answer:

synthesis

Explanation:

The reaction given is a synthesis reaction or combination reaction.

Given equation:

NH₃ + HCl → NH₄Cl

In a synthesis reaction, a single product is formed from two or more reactants

A + B → C

The formation of compounds from the union of constituent elements also falls into this category.

So the given reaction is a synthesis reaction.

In a decomposition reaction two or more products are formed from a single reactant

In a single replacement reaction, one substance replaces another.

In double replacement reactions partners in a chemical specie are exchanged.

Therefore the given reaction is a synthesis reaction

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Many computer chips are manufactured from silicon, which occurs in nature as SiO2. When SiO2 is heated to melting, it reacts wit

guajiro [1.7K]

Answer:

a) The limiting reagent in this reaction is SiO₂ .

b) The theoretical yield of Si from this reaction = 72,494.85 g = 72.5 kg

c) The percent yield of Si from this reaction = 91%

Explanation:

a) The limiting reagent is the reagent whose amount at the start of the reaction is in shortage according to the stoichiometric balance. It is is the reactant that determines how much of other reactants will react and how much products will be formed. It is theoretically, completely used up in the reaction.

The non-limiting reagent is usually in excess according to the stoichiometric balance.

154.9 kg of SiO2 is allowed to react with 78.0 kg of carbon to produce 66.0 kg of silicon.

The balanced equation for the reaction is

SiO₂ + 2C -------> Si + 2CO

1 mole of SiO₂ reacts with 2 moles of C according to the stoichiometric balance

To obtain which reactant is in excess and which one is the limiting reagent, we have to find the number of moles of reactant present at the start of the reaction.

Number of moles = (mass)/(molar mass)

For SiO₂, mass = 154.9 kg = 154,900 g, Molar mass = 60.02 g/mol

Number of moles = (154900/60.02)

Number of moles = 2580.81 moles

For Carbon, mass = 78.0 kg = 78,000 g, Molar mass = 12.011 g/mol

Number of moles = (78000/12)

Number of moles = 6494.05 moles

Recall, 1 mole of SiO₂ reacts with 2 moles of C

If Carbon was the limiting reagent,

6494.05 moles of Carbon would require (6494.05/2) moles of SiO₂ to react; 3247.025 moles of SiO₂. Which is more than the available number of moles of SiO₂ at the start of the reaction. Hence, Carbon isn't the limiting reagent.

SiO₂ as the limiting reagent,

1 mole of SiO₂ reacts with 2 moles of Carbon,

2580.81 moles of SiO₂ would react with (2×2580.81) moles of Carbon; 5161.62 moles of Carbon. Which is in the limit of available number of moles of Carbon at the start of the reaction. Hence, SiO₂ is the limiting reagent which determines which amount of other reactants react and the amount of products formed.

b) Theoretical yield of Si in the reaction.

SiO₂ + 2C -------> Si + 2CO

SiO₂ being the limiting reagent.

1 mole of SiO₂ gives 1 mole of Si,

2580.81 moles of SiO₂ will give 2580.81 moles of Si.

Mass produced = (number of moles produced) × (Molar mass)

Number of moles of Si produced = 2580.81 moles

Molar mass of Si = 28.09 g/mol

Theoretical mass of Si produced = (2580.81) × (28.09) = 72494.85 g = 72.5 kg

c) Percemt yield of Si

Percent yield = 100% × (Actual yield)/(Theoretical yield)

Actual yield of Si = 66 kg

Theoretical yield of Si = 72.49485 kg

Percent yield = 100% × (66/72.49485)

Percent yield = 91.04% = 91%

Hope this Helps!!!

8 0

3 years ago

Read 2 more answers

A gas has a volume of 300 mL in a rigid container at 50oC and 1.75 atm. What will be its pressure at 100K?

eduard

Answer:

Its pressure will be 0.54 atm at 100 K.

Explanation:

Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

Gay-Lussac's law can be expressed mathematically as the quotient between pressure and temperature equal to a constant:

$\frac{P}{T} =k$

Studying two different states, an initial state 1 and a final state 2, it is satisfied:

$\frac{P1}{T1} =\frac{P2}{T2}$

In this case:

P1= 1.75 atm
T1= 50 °C= 323 K (being 0 C=273 K)
P2= ?
T2= 100 K

Replacing:

$\frac{1.75 atm}{323 K} =\frac{P2}{100 K}$

Solving:

$P2= 100 k*\frac{1.75 atm}{323 K}$

P2= 0.54 atm

Its pressure will be 0.54 atm at 100 K.

8 0

3 years ago

Rank the following hydroxides in order of increasing aqueous basicity: Al(OH)₃, (OH)₃, In(OH)₃

vovangra [49]

The correct answer is B(OH)3 <AI(OH)3 < In(OH)3.

The metallic character of the group 1 elements first increases from Boron to Aluminium, then decreases from Aluminium to Thallium because of high ionization Enthalpy. Also, the larger size of the ion, the lesser is the ionization of Enthalpy.

Basic nature of the hydroxides of group 13 increases on moving down the group as the electro-positive character of elements increases.

Therefore, the correct order of increasing aqueous basicity is as follows:

B(OH)3 <AI(OH)3 < In(OH)3

What is the basic nature of group 13?

The metallic charecter of the elements affects their fundamental characteristics. The basicity rises as the metallic character does, and vice versa. Therefore, as we move lower in any given group, the atomic radius of the elements increases. Higher radii indicate that it would become increasingly challenging for the nucleus to rule over the electrons in the valency shell. Consequently, there will be a greater inclination for electron release. As a result, the metallic properties will improve, increasing the basicity of the oxides. Therefore, it follows that the basicity of the oxides would rise as we go down in a group.

To learn more about hydroxides refer the link:

brainly.com/question/10134219

#SPJ4

7 0

2 years ago

The electrolysis of water has the equation 2H2O (l) → 2H2 (g) + O2 (g). What type of reaction is this?

Sonja [21]

Answer: The correct option is C) decomposition

Explanation:

Single displacement reaction is defined as the reaction where a more reactive element displaces a less reactive element from its salt solution.

$AX+B\rightarrow BX+A$

Element B is more reactive than element A

Double displacement reaction is defined as the reaction where an exchange of ions takes place in a solution

$AX+BY\rightarrow AY+BX$

Decomposition reaction is defined as the reaction where a single large chemical species breaks down into two or more smaller chemical species.

$AB\rightarrow A+B$

Synthesis reaction is defined as the reaction where two or more smaller chemical species combine together in their elemental state to form a single large chemical species.

$A+B\rightarrow AB$