Assuming that the experiment started
with the magnesium and did not combine with oxygen, this extra mass would actually
decrease the amount of oxygen. This is because it only artificially increases
the original mass. Therefore this actually increases the error.
Answer:
<span>too low</span>
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Answer:
D
Explanation:
but I am not sure about the answer
Answer:
<h2>4</h2>
Explanation:
1. Photorespiration occurs in plants and it is a wasteful pathway, it competes with the Calvin cycle. It begins when rubisco (Ribulose-1,5-bisphosphate carboxylase/oxygenase (RUBISCO) catalyzes both CO2 and O2 fixation) acts on O₂ instead of CO₂.
2. Photorespiration is initiated by the oxygenase activity of rubisco, the same enzyme that is also responsible for CO2 fixation.
3. Phosphoglycolate formed by O₂ fixation is recycled to the Calvin cycle intermediate phosphoglycerate in the photorespiratory pathway.
4. During oxygen fixation,1 molecule of PGA and 1 molecule of 2-phosphoglycolate are formed. The 2-phosphoglycolate is converted back to PGA in the photorespiratory cycle.
Answer:
5 g of heptane were burned.
Explanation:
Given data:
Mass of CO₂ produced = 15.5 g
Mass of heptane burned = ?
Solution:
Balance chemical equation:
C₇H₁₆ + 11O₂ →7CO₂ + 8H₂O
First of all we will calculate the moles of CO₂ produced.
Number of moles = mass / molar mass
Molar of CO₂ = 44 g/mol
Number of moles = 15.5 g / 44 g/mol
Number of moles = 0.3523 mol
Now we will compare the moles of CO₂ and C₇H₁₆ from balance chemical equation
CO₂ : C₇H₁₆
7 : 1
0.3523 : 1/7 × 0.3523 = 0.05 mol
Mass of C₇H₁₆:
Number of moles = mass / molar mass
Mass = number of moles × molar mass
Mass = 0.05 mol / 100 g/mol
Mass = 5 g