CHEMISTRY HIGH SCHOOL

Given: The equation for the synthesis of ammonia is H2(g) + N2(g) → NH3(g). If 12.0 grams of hydrogen are used up by the reaction, how many grams of ammonia will be produced?

Answers

Answer 1
Answer:

Answer:

The answer to your question is 68 g

Explanation:

Data

mass of H₂ = 12 g

mass of NH₃ = ?

Balanced chemical reaction

               3H₂  +  N₂   ⇒   2NH₃

Process

1.- Calculate the molar mass of H₂

H₂ = 1 x 6 = 6

NH₃ = 2[(14 x 1) + (3 x 1)]

       = 2[14 + 3]

       = 2[17]

       = 34 g

2.- Use proportions to find the mass of NH₃

                 6 g of H₂ --------------- 34 g of NH₃

                12g of H₂ ----------------  x

                        x = (12 x 34) / 6

                        x = 408/6

                        x = 68 g of NH₃

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If a solid piece of naphthalene is heated and remains at 80°C until it is completely melted, you know that 80ºC is the

Answers

Answer: Melting point of the naphthalene is 80^oC.

Explanation:

Melting point of a substance is temperature at which given solid changes its state from solid to liquid. It is also referred as freezing point of the substance.

Freezing point of substance is a temperature at which given substance changes its state from liquid to solid.

Here, the solid piece of naphthalene is heated and remains at 80°C until it is completely melted.

Answer  : Freezing and Melting point

Explanation :

The solid piece of naphthalene when heated is observed to melt after it attains the temperature of 80° C and then this 80° C is called as it melting point. After 80° C naphthalene will start to melt and get transformed into liquid state. Also if this naphthalene is allowed to cool down after 80° C it will be the freezing point of naphthalene.

Although wave power does not produce pollution, some people may not want to invest in it because it is _____.

Answers

Answer:

Prone to storm damage and limited to particular areas of the ocean

Explanation:

Hello,

Even when the wave power is beneficent towards the environment care, it has a notable disadvantage when high energy waves are took by the energy stations by cause of electrical failures which lead to the station breakdown. On the other hand, there are hard-to-access areas in the ocean which restricts the enforcement of this type of energy.

Best regards.
The correct answer for the question that is being presented above is this one: "Although wave power does not produce pollution, some people may not want to invest in it because it harms marine life and its difficult to mountain it also disturbs the route of the ships."

An excellent tool to gauge the reliability of any theory is its capacity to generate correct? a.models b.predictions c.data d.hypotheses.

Answers

An excellent tool to gauge the reliability of any theory is its capacity to generate correct hypotheses. Hypotheses is validated by theories, and theories make up laws.

Answer:

hypotheses

Explanation:

Fog is a cloud that hasa. a small vertical extent.
b. no ability to produce rain.
c. particles made of ice crystals.
d. its base at or near the ground

Answers

Answer: d. Its base at or near the ground.

 

Explanation:

Fog is a visible weather condition in which the tiny droplets of water present in the atmosphere come together and which forms a thick cloud which lies close to the surface of the ground (land) or above the sea surface. Fog cuts the visibility down to one kilometers, it makes it difficult to observe the things through it. The fog is influenced by several factors such as wind conditions, nearby water bodies, and topography.

Fog is a cloud that has its base at or near the ground. The answer is letter D. Fog results when atmospheric water vapor condenses to the extent that the new forms, water droplets or ice crystals, become visible. Saturation of the air and sufficient condensation nuclei are ordinarily prerequisites for the formation of fog. One of the great hazards associated with fog is a lack of visibility.

 

5.This ancient element symbol
means ...
A. copper
B. silver
c. gold
D. tin

Answers

Answer:

A im pretty sure

Explanation:

What is the net ionic equation for the reaction of solid iron with aqueous copper sulfate? (Hint: First use the activity series to write the formula unit equation!)

Answers

For the answer to the question above,
The reaction of solid iron with aqueous copper sulfate is an example of a single displacement type of reaction which exchanges only the cations of the element and the compound. In this case, the equation is 

Fe (s) + CuSO4 (aq) = FeSO4 + Cu (s) 

Answer:

The net ionic equation for the reaction of solid iron with aqueous copper sulfate:

Fe(s)+Cu^(2+)(aq)\rightarrow Fe^(2+)+(aq)+Cu(s)

Explanation:

Solid iron = Fe

Copper sulfate = CuSO_4

Fe(s)+CuSO_4(aq)\rightarrow FeSO_4(aq)+Cu(s)

In an aqueous solution of copper sulfate we have copper (II) ions and sulfate ions.

CuSO_4(aq)\rightarrow Cu^(2+)(aq)+SO_4^(2-)(aq)

In an aqueous solution of ferrous sulfate we have ion (II) ions and sulfate ions.

FeSO_4(aq)\rightarrow Fe^(2+)+(aq)+SO_4^(2-)(aq)

Fe(s)+Cu^(2+)(aq)+SO_4^(2-)(aq)\rightarrow Fe^(2+)+(aq)+SO_4^(2-)(aq)+Fe^(2+)+(aq)

Cancelling out the common ions from both sides, we get the net ionic equation:

Fe(s)+Cu^(2+)(aq)\rightarrow Fe^(2+)+(aq)+Cu(s)
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