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boyakko [2]
3 years ago
6

PLEASE HELP ME WITH A COUPLE OF QUESTIONS!!! Thank You :)

Chemistry
1 answer:
Brrunno [24]3 years ago
5 0
Hey there!

1. A chemical reaction is, B).<span> Any time different substances combine to form a new substance, or when a substance breaks up into different substances

2.</span> Balancing chemical equations is called, C). <span>Equivalentry

3.</span><span> Sulfuric acid is made of two hydrogen atoms (H), one sulfur atom (5), and four oxygen atoms (0). What is its formula? C). </span><span>H2S04


Hope this helps!


-Much love, Makayla</span>
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Answer:

36.92 mg of oxygen required for bio-degradation.

Explanation:

5C_6H_6+15O_2\rightarrow 12CO_2+15H_2O

Mass of benzene = 30 mg = 0.03 g (1000 mg = 1 g )

Moles benzene =\frac{0.03 g}{78 g/mol}=0.0003846 mol

According to reaction 5 moles of benzene reacts with 15 moles of oxygen gas.

Then 0.0003846 mol of benzene will react with:

\frac{15}{5}\times 0.0003846 mol=0.0011538 mol 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.

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