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3 years ago

How many moles of NO gas are formed from 2.25 moles of nitrogen?

Chemistry

1 answer:

VikaD [51]3 years ago

7 0

Hey there!

A mole is measured in atoms, molecules, particles. It's kind of a loose sort of measurement, just unit of the substance.

Since there is a ratio of 1 to 1 nitrogen to oxygen, there will be the same amount of molecules as atoms of nitrogen.

2.25 moles of NO gas are formed from 2.25 moles of nitrogen.

Hope this helps!

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During chemistry, Dan mixes two clear, colorless solution and mixing them produces a yellow precipitate in a clear, colorless fi

kondor19780726 [428]

Answer : Formation of yellow precipitate is the physical evidence that there has been a chemical reaction.

Explanation :

A chemical reaction happens when 2 or more substances chemically react with each other.

There are 4 evidences indicating that a chemical reaction has occurred which are mentioned below.

1. Change in color : On mixing, the reaction mixture can change color indicating that a chemical change may have occurred.

2. Formation of precipitate : A reaction in which a solid is formed on mixing 2 aqueous solutions is called as precipitation reaction. Here, the formation of solid indicates a chemical change.

ex. $AgNO_{3} (aq) + NaCl (aq) \rightarrow AgCl (s) + NaNO_{3} (aq)$

In above reaction, on mixing the solutions, a white precipitate of AgCl is formed which indicates a chemical change.

3. Evolution of gas : A chemical change also occurs when a gas is evolved on mixing 2 substances.

ex. $2HCl (aq) + Na_{2}CO_{3} (aq) \rightarrow 2NaCl (aq) + H_{2}O (l) + CO_{2} (g)$

In above reaction, CO2 gas is evolved and bubbles can be seen in the form of effervescence.

4. Change in temperature : Certain chemical reactions absorb or evolve heat. When a chemical reaction evolves heat, the temperature of the final reaction mixture increases and when it absorbs heat, the temperature decreases. This increase and decrease in temperature indicates a chemical change.

ex. $HCl (aq) + NaOH (aq) \rightarrow NaCl(aq) + H_{2}O (l)$

In above reaction, the final mixture becomes hot as the reaction releases heat. ( Exothermic)

Change in odor also indicates a chemical change.

For the given reaction, a yellow precipitate of PbI2 is getting formed.

Therefore formation of this precipitate is the physical evidence that there has been a chemical reaction.

8 0

3 years ago

Besides hydrogen and oxygen what is required to produce the chemical reaction that yields water

timurjin [86]

Hey there! Hello!

In order for water to be formed, or for any reaction to occur, there needs to be something that splits the current bonds of hydrogen and oxygen up. In this case, some sort of activation energy is required.

Hydrogen and oxygen are not found as single molecules in nature. They're found as 2 molecules linked together, as H2 and O2. An activation energy, such as heat, or some sort of catalyst needs to be used in order to split the two molecules up and make them link with one another.

What happens afterwards is a chemical reaction that involves the valence electrons of oxygen (which has 6 on the outermost shell) and hydrogen (which has two on the outermost shell). The oxygen wants to have an octet (8 valence electrons) total, so it shares with the hydrogen, which is already satisfied with it's two valence electrons (according to the nature of hydrogen).

But because there has to be a total of four molecules involved, two molecules of water are going to be produced as a result.

$2H+2O=2H20$

Hope this helped you out! Feel free to ask me any additional questions if you need further clarification. :-)

3 0

3 years ago

Is kp or kc larger (both at 300 k) for the reaction 2 nh3(g) ⇀↽ n2(g) + 3 h2(g) ? 1. they are both the same. 2. kc is larger. 3.

fgiga [73]

The equation is 2 NH3 (g) â‡€â†˝ N2 (g) + 3 H2 (g)
Difference in the number of moles delta n = ((3 + 1) - 2) = 4 - 2 = 2
We have an equation Kp= Kc (R x T) ^ (delta n); R is constant and T = 300 K
Kp / Kc = (R x T) ^2 Based on the temperature value (300 K), we can conclude that Kp is Larger.

5 0

3 years ago

A sample of 1L of gas in a container at-73C has a pressure of 32.2inHg. To

Goryan [66]

Answer:

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I can't sleep no more

In my head, we belong

And I can't be without you

Why can't I find no one like you?

I can't sleep no more

In my head, we belong

And I can't be without you

Why can't I find no one like you?

Explanation:

8 0

3 years ago

A 0.0200 gram piece of unknown alkaline earth metal, M, is reacted with excess 0.500 M H₂SO₄, and the hydrogen gas produced i

mamaluj [8]

Answer:

a)0.981 atm

b)0.000787 moles of hydrogen gas.

c)25.4 g

d)4.5%

Explanation:

a) Partial pressure of hydrogen gas = total pressure of gas collected - pressure of water vapour

Partial pressure of hydrogen gas= 1.01 atm - 0.029 atm = 0.981 atm

Number of moles of hydrogen gas can be obtained from the ideal gas equation;

PV= nRT

P= pressure of dry hydrogen gas= 0.981 atm

V= volume of hydrogen gas= 19.6 ml or 0.0196 L

T= 24° + 273 = 297 K

R= 0.082 L.atm.K-1.mol-1

n= PV/RT= 0.981 × 0.0196 / 0.082 × 297

n= 0.0192/24.4

n= 0.000787 moles of hydrogen gas.

From the reaction equation;

1 mole of the metal yielded 1 mole of hydrogen gas hence 0.000787 moles of the metal will yield 0.000787 moles of hydrogen gas.

Molar mass of the metal is obtained from;

Number of moles = reacting mass / molar mass

Molar mass = reacting mass/ number of moles

Molar mass= 0.0200 g /0.000787 moles

Molar mass of metal= 25.4 g

% error in the molar mass of the metal = 25.4-24.3/24.3 × 100/1

% error in the molar mass of the metal = 4.5%

6 0

4 years ago