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Stoichiometric Calculations

In photosynth...

Question

In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula $C_{6} H_{12} O_{6}$ . How many grams of water would be required to produce 18 g of glucose? Compute the volume of water so consumed assuming the density of water to be $1 g c m^{- 3}$ .
Rreaction that takes place during photosynthesis is:
$6 C O_{2} + 6 H_{2} O$ $⟶$ $C_{6} H_{12} O_{6} + 6 O_{2}$

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Solution

Molecular mass of $6 H_{2} O$ = 6[(1 x 2) + 16)] =6 x 18 =108g
Molecular mass of $C_{6} H_{12} O_{6}$ = 12 x 6 + 1 x 12 +16 x 6 = 180g

180 g of glucose needs $(6 \times 18) g$ of water
Therefore, 18 g of glucose will need $\frac{108}{180} \times 18 g$ of water = 10.8 g

Given, density of water to be $1 g c m^{- 3}$
mass of water = 10.8 g
Therefore, Volume of water used $= \frac{M a s s}{D e n s i t y} = \frac{10.8 g}{1 g c m^{- 3}} = 10.8 c m^{3}$

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Similar questions

Q. In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula

C_{6} H_{12} O_{6}

. How many grams of water would be required to produce 18 g of glucose? Compute the volume of water so consumed assuming the density of water to be

1 g c m^{- 3}

.
Rreaction that takes place during photosynthesis is:

6 C O_{2} + 6 H_{2} O

⟶

C_{6} H_{12} O_{6} + 6 O_{2}

Q. In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula

C_{6} H_{12} O_{6}

. How many grams of water would be required to produce 18 g of glucose? Compute the volume of water so consumed assuming the density of water to be

1 g c m^{- 3}

Q. Question 48
In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula

C_{6} H_{12} O_{6}

. How many grams of water would be required to produce 18 g of glucose? Compute the volume of water so consumed assuming the density of water to be

1 g c m^{- 3}

Q. In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula

C_{6} H_{12} O_{6}

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Q. In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula

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. The mass of water required to produce 18 g of glucose is____________.

(answer should be the nearest integer)

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