Chemistry, 10.01.2020 23:31 dylan3366

The following equation shows the formation of water (h2o, 18.02 g/mol) from hydrogen (h2, 2.02 g/mol) and oxygen (o2, 32.00 g/mol): 2h2 + o2 2h2o if 3.5 g h2 react with 18.7 g o2, what is the limiting reactant?
a> n> s: o2

Answers: 3

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Answers

Answer from: marialegarda4211

Explanation:

Data Given:

Amount of hydrogen (H₂) = 3.5 g

Oxygen gas (O₂) = 18.7 g

molar mass of H₂O = 18.02 g/mol

molar mass of O₂ = 32 g/mol

molar mass of H₂ = 2.02 g/mol

limiting reactant = ?

Solution:

limiting reactant: The amount of reactant that consume first in a reaction is termed as limiting reagent or limiting reactant.

Excess reagent: the amount of reactant that remain un-reacted at the end of the reaction is termed as excess reagent.

Now to look for the limiting regent we have to look at reaction

Reaction:

2H₂ + O₂ > 2H₂O

Convert moles to masses

2H₂ + O₂ > 2H₂O

2 mol 1 mol

As we know

molar mass of O₂ = 32 g/mol

molar mass of H₂ = 2.02 g/mol

So we can write it as below

2H₂ + O₂ > 2H₂O

2 mol (2 g/mol) 1 mol (32 g/mol)

4 g 32 g

To know with how much hydrogen will react with oxygen apply unity formula

4 g of Hydrogen ≅ 32 g of O₂

g of Hydrogen ≅ 18.7 g of O₂

So,

g of H₂ = 4 g x 18.7 g / 32 g

g of H₂ = 2.33 g

So,

18.7 g of oxygen fully consumed and react with 2.33 g of Hydrogen and 1.16 g of hydrogen remain unreacted.

Oxygen is limiting reactant

From this balance reaction we come to know that 18.7 g of oxygen react with 2.33 g of hydrogen molecule. It means that amount of oxygen is less and it will consume first and act as limiting reactant.

Answer from: Quest

what are the two models

explanation:

Answer from: Quest

Mass is the amount of matter in an object. weight is the measurement of the pull of gravity on an object. say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165) now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon. however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant. in conclusion it is possible for your weight to change as your mass remains constant.

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The following equation shows the formation of water (h2o, 18.02 g/mol) from hydrogen (h2, 2.02 g/mol...

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