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larisa [96]
3 years ago
8

How many moles of C2H2 are needed to react completely with 84.0 mol O2?

Chemistry
2 answers:
docker41 [41]3 years ago
5 0

Answer: 33.6 moles

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.

Combustion of ethylene is represented by following balanced equation:

2C_2H_2+5O_2\rightarrow 4CO_2+2H_2O

According to stoichiometry:

5 moles of O_2 react completely with = 2 moles of C_2H_2  

Thus 84.0 moles of O_2 react completely with =\frac{2}{5}\times 84.0=33.6 moles of C_2H_2  

Thus 33.6 moles of C_2H_2 are needed to react completely with 84.0 mol O_2

Airida [17]3 years ago
3 0
33.6 moles are needed to completely react with 84.0 moles of O2
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Daniel [21]

  • The water in the pot becomes hotter as a result of heat transfer.

  • <em>Energy can be transferred from a region to another , but there will still the same overall amount of energy</em> ( energy conservation)

  • When a pot containing water  is  placed on the stove and  heat is applied with the burner, there is a flow of heat from the burner to the water.

  • Heat will be transferred from the burner to the pot, then there will be transferred of heat from the pot to the water, the molecules there in the water  will be energized as a result of the heat transfer until the boiling point  is  reached.

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  • Convention which is a cyclical process is the one that occurs in fluids only so as a result of convection , the water at the bottom will be heated and the molecules start moving and it will rise till it get to the water at the top of the pot.

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8 0
3 years ago
What is the molar concentration of a 2 liter solution containing 200 grams of glucose?
NARA [144]

The molar concentration is 1.11M.

<h3>What is molar concentration?</h3>

The phrase "molar concentration" (also known as "molarity," "amount concentration," or "substance concentration") refers to the amount of a substance per unit volume of solution and is used to describe the concentration of a chemical species, specifically a solute, in a solution. The most frequent measure of molarity in chemistry is the number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units. A solution with a concentration of 1 mol/L is referred to as 1 molar, or 1 M.

<h3>Given : </h3>

Volume of the solution = 2L

Mass of glucose given = 200g

Concentration of glucose= ?

<h3>Formula use: </h3>

Molarity = no. of moles of solute / volume of the solution (L)

Moles of solute = given mass of solute / molar mass of the solute

<h3>Solution: </h3>

No. of moles of solute( glucose ) = 200 / 180 = 1.11 moles'

Molarity = 1.11 / 2 = 0.5555 mol L ^(-1)

Therefore, the molar concentration of glucose in the solution = 0.555 mol L ^(-1)

To learn more about molar concentration :

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2 years ago
Container A (with volume 1.23 L) contains a gas under 3.24 atm of pressure. Container B (with volume
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Now that a lot of pressure

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6 0
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How many molecular of H2O and O2 are present in 8.5g of H2O2 ?​
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hence H2O is also 0.25 mole i.e.4.5 gm  

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4 0
3 years ago
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