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Lisa [10]
3 years ago
12

Two Chemistry questions 30 points

Chemistry
1 answer:
coldgirl [10]3 years ago
6 0

Answer:

999

Explanation:

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Atmospheric pressure at sea level is 760 mm Hg, and oxygen makes up 20.9% of this air when it is dry. Scientists at the Mt. Wash
Lubov Fominskaja [6]

Answer:

127.28 mmHg

Explanation:

The molar fraction of oxygen in dry air at 760 mmHg is 20.9%. This molar fraction is not affected too much by the height, so it may be taken as a constant. The partial pressure of oxygen may be calculated as:

P_{O_{2}}=y_{O_{2}}*P

So, if the total pressure is 609 mmHg,

P_{O_{2}}=0.209*609=127.28 mmHg.

8 0
3 years ago
How many chloride ions are there
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Can you show me a picture or a diagram
7 0
3 years ago
1.If 6 moles of KNO3 should be produced in a reaction, but only 4.78 mol KNO3 are produced, what is the % yield?
irakobra [83]

Answer:

79.7%

Explanation:

Percent yield of reaction is defined as the ratio between theoretical yield of a reaction and actual yield obtained.

In the problem, theoretical yield are 6 moles of KNO₃ and actual yield are 4.78 moles. Thus, percent yield is:

4.78 mol / 6 mol × 100 =<em> 79.7%</em>

3 0
3 years ago
A bike tire has a volume of 0.850L at a pressure of 40.0 psi and 0.00°C. What will be the
Tema [17]

Answer:

45.13 psi

Explanation:

Assuming the volume does not change

P1/T1 = P2/T2         T  must be in Kelvin

40/(273.15) = P2/(273.15 + 35)       P2 = 45.13 psi

4 0
2 years ago
How many moles are in 6.93 x 1023 sulfur dioxide molecules?
kolezko [41]

Answer: 1.15 moles

Explanation:

1 mole = 6.02214076*10^23 molecules

7 0
3 years ago
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