Experimental hypothesis

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i. Experimental hypothesis: Different volumes of carbon (IV) oxide are liberated during cellular respiration in sucrose, glucose, and lactose yeast cells.

ii. Unknown variable: Temperature

Variable that is dependent: CO2 gas volume.

iii. Factors that should remain constant during the experiment:

Each culture contains a large amount of yeast.

Each culture consumes a large amount of sugar.


c. The number of atoms before balancing the equation for Ammonia synthesis.

N2(g) + H2(g) NH3(g) (Ammonia) (Ammonia)

Atom type Reactants Products

N\s 2\s 1\s H\s 2\s 3

The number of atoms in the balanced equation for Ammonia synthesis.

N2(g) + 3H2(g) 2NH3(g)

Atom type Reactants Products

N 2 2 H 6 6 Bibliography

 Twygg, Martyn. Catalyst Handbook. Oxford: Oxford University Press, 2009.

April 19, 2023


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Expertise Chemical Reaction
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