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Alenkasestr [34]
3 years ago
5

8.84 g of a compound is analyzed and found to contain 3.53 g of C, 0.295 g of H, 4.08 g of N, and 0.935 g of O. Which of the fol

lowing could be the molecular formula for this compound?
C5H10N3O3

1. C10H10N10O2
2. C2H4N6O
3. C8H8N8O4
4. C4H8N6O2
Chemistry
1 answer:
svetoff [14.1K]3 years ago
4 0

Answer:

Option 1 is correct. C10H10N10O2

Explanation:

Step 1: Data given

Mass of a compound = 8.84 grams

Mass of C = 3.53 grams

Mass of H = 0.295 grams

Mass of N = 4.08 grams

Mass of O = 0.935 grams

Atomic mass C = 12.01 g/mol

Atomic mass H = 1.01 g/mol

Atomic mass N = 14.0 g/mol

Atomic mass O = 16.0 g/mol

Step 2: Calculate moles

Moles = mass / molar mass

Moles C = 3.53 grams / 12.01 g/mol

Moles C = 0.294 moles

Moles H = 0.295 grams / 1.01 g/mol

Moles H = 0.292 moles

Moles N = 4.08 grams / 14.0 g/mol

Moles N = 0.291 moles

Moles O = 0.935 grams / 16 g/mol

Moles O = 0.0584 moles

Step 3: Calculate mol ratio

We divide by the smallest amount of moles

C: 0.294 / 0.0584 = 5

H: 0.292 / 0.0584 = 5

N: 0.291/0.0584 = 5

O: 0.0584/0.0584 = 1

The empirical formula is C5H5N5O

Option 1 has this empirical formula

C10H10N10O2

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One product of the Calvin cycle is the glyceraldehyde-3-phosphate (G3P), which is later on used in the production of glucose and in the regeneration of <span>Ribulose 1,5-bisphosphate (RuBP), which is an organic compound</span> essential to the reactions in the cycle. 

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Thus, 3 turns of the carbon cycle will produce 1 surplus G3P. There are 8 sets of 3-turns in 24 cycles, therefore, 

                       1 net G3P molecule * 8 sets of 3-turns  = 8 G3P molecules

Therefore, there are 8 net or surplus G3P molecules produced for 24 cycles of the Calvin Cycle. The total G3P molecules produced, including the ones that participated in the regeneration of RuBP would be 48 G3Ps. 

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The figure below shows the products of the cycle after 3 turns (Source: https://ka-perseus-images.s3.amazonaws.com/2f4bdc8f8275834d3f5ef434d93bf16b991b2357.png). 

7 0
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pH = 4.60.

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