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Juliette [100K]
3 years ago
10

The EPA sets national air-quality standards for common air pollutants. The

Chemistry
1 answer:
Troyanec [42]3 years ago
7 0

Answer:

A

Explanation:

Just took the quiz

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What is the mass of one mole of nitrogen atoms?
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28.0

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3 years ago
The volume of a gas is 450 mL when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the pressure
Delvig [45]

Answer:

0.225 atm

Explanation:

v1=450ml÷1000=0.45l(1l=1000ml)

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v2=2.00l

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p2=p1v1/v2

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3 0
2 years ago
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How many liters of phosphine are produced when 34 L of hydrogen reacts with an excess of phosphorus under STP?
Keith_Richards [23]

Answer:

22.67 L of PH₃

Explanation:

The balanced equation is:

P_4 (s) + 6H_2(g) \to 4PH_3(g)

From the equation:

34 L \times \dfrac{1 \ mol \ of H_2 }{22.4 \ L \ H_2} \times \dfrac{4 \ mol \ of \ PH_3}{6 \ mol \ H_2} \times \dfrac{22.4 \ L \ PH_3}{1 \ mol \ PH_3}

= 22.67 L of PH₃

5 0
3 years ago
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