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3 years ago

The following balanced equation shows the formation of water.

2 answers:

8 0

Mole ratio of H₂ : O₂ is 2 : 1

∴ if mole of H₂ = 1.67 mol

then mole of O₂ = $\frac{1.67 mol}{2}$

⇒ that mole of oxygen needed to react with H₂ = 0.835 mol

The answer is A

saveliy_v [14]3 years ago

8 0

Answer: A) 0.835 mol of $O_2$

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.

As can be seen from the given balanced equation:

$2H_2+O_2\rightarrow 2H_2O$

2 moles of hydrogen are required to react completely with 1 mole of oxygen.

Thus 1.67 moles of hydrogen will react with= $\frac{1}{2}\times 1.67=0.835$ moles of oxygen.

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3 years ago

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<h3>What are balanced chemical equations?</h3>

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To balance chemical equations, numerical coefficients are placed in front of the species in the reaction.

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Learn more about balancing equations at: brainly.com/question/11904811

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3 years ago

You need to produce a buffer solution that has a pH of 5.26. You already have a solution that contains 10. mmol (millimoles) of

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The question is incomplete, complete question is :

You need to produce a buffer solution that has a pH of 5.50. You already have a solution that contains 10 mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acetic acid) will you need to add to this solution? The pka of acetic acid is 4.74.

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$pH=pK_a+\log(\frac{[salt]}{[acid]})$