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dmitriy555 [2]
2 years ago
15

If the reaction of 5.87 moles of potassium with excess hydrobromic acid was able to produce 2.49 mol H2, what is the percent yie

ld of hydrogen gas? (3 points)
Unbalanced equation: K + HBr yields KBr + H2

1. 14.6%
2. 29.2%
3. 42.4%
4. 84.8%
Chemistry
1 answer:
olga_2 [115]2 years ago
7 0

Answer: 2. 29.2%

Explanation:

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3 years ago
How many moles are equal to 1.3 x 1024 atoms of aluminum?
marshall27 [118]

Answer:

<h3>The answer is 2.16 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

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From the question we have

n =  \frac{1.3 \times  {10}^{24} }{6.02 \times  {10}^{23} }  \\  = 2.159468...

We have the final answer as

<h3>2.16 moles</h3>

Hope this helps you

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