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Afina-wow [57]
3 years ago
9

Convert 22.5 grams H2O to moles​

Chemistry
2 answers:
TEA [102]3 years ago
5 0

Answer:

1.25mol

Explanation:

moles(n)=mass/Mr

Mr of H2O=(1*2)+16

                 =18

n=22.5/18

 =1.25 mol

kenny6666 [7]3 years ago
4 0

Answer:

18.01528

Explanation:

The answer is 18.01528.

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Succinic acid is a substance produced by lichens. Chemical analysis indicates it is composed of 40.68% C, 5.08% H, and 54.24% O.
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Answer:  

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Explanation:  

Assume that you have 100 g of the compound.  

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Moles of C  = 40.68 × 1/12.01   = 3.387 mol C

Moles of H =    5.08 × 1/1.008   = 5.010 mol H

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===============

2. Calculate the <em>molar ratios</em>.  

Divide all values by the smallest number.

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O: 3.390/3.387 = 1.001

===============

3. <em>Multiply each ratio by 2 </em>

C:  2 × 1       = 2

H: 2 × 1.479 = 2.958

O: 2 × 1.001 = 2.002

===============

4. Determine <em>the empirical formula</em>

Round off all numbers to the closest integer.  

C: 2

H: 3

O: 2

The empirical formula is C₂H₃O₂.  

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