10.How do you make sure there is no cross contamination of your samples of substances?
1 answer:
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Answer:
<h3>The answer is 7.42 </h3>Explanation:
The pH of a solution can be found by using the formula
From the question we have
We have the final answer as
<h3>7.42 </h3>Hope this helps you
Answer:
36.92 mg of oxygen required for bio-degradation.
Explanation:
Mass of benzene = 30 mg = 0.03 g (1000 mg = 1 g )
Moles benzene =
According to reaction 5 moles of benzene reacts with 15 moles of oxygen gas.
Then 0.0003846 mol of benzene will react with:
of oxygen gas
Mass of 0.0011538 moles of oxygen gas:
0.0011538 mol × 32 g/mol = 0.03692 g = 36.92 mg
36.92 mg of oxygen required for bio-degradation.