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Stella [2.4K]
3 years ago
13

If you changed the temperature of a ball from 28°C to 14°C, would you expect the pressure to increase or decrease?

Chemistry
1 answer:
attashe74 [19]3 years ago
8 0

Answer:

Decrease

Explanation:

Air "contracts" in colder temperatures.

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How many grams of sodium chloride are required to make a 1.0 L solution with a concentration of 3.5 M?
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3.5 M has 3.5 moles per litre
so we have one litre, so we need 3.5 moles
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What is 5.73 moles in grams
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Heisenberg's uncertainty principle tells us that _____. heisenberg's uncertainty principle tells us that _____. the de broglie w
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3 years ago
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A 6.165 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 10.27 grams of CO2 and 3
e-lub [12.9K]

Answer:

Explanation:

mass of carbon in 10.27 g of CO₂ = 12 x 10.27 / 44 = 2.80 g

mass of hydrogen ( H ) in 3.363 g of H₂O = 2  x 3.363 / 18

= .373 g

These masses would have come from the sample of 6.165 g .

Rest of 6.165 g of sample is oxygen .

So oxygen in the sample = 6.165 - ( 2.8 + .373 ) = 2.992 g

Ratio of C  , H , O in the sample

2.8 : .373 : 2.992

C: H : O : : 2.8 : .373 : 2.992

Ratio of moles

C: H : O : : 2.8/12 : .373/1 : 2.992 / 16

C: H : O : : .2333 : .373 : .187

C: H : O : : .2333/.187 : .373/.187 : .187/.187

C: H : O : : 1.247 : 1.99 : 1

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Hence empirical formula

C₅H₈O₄

Molecular formula ( C₅H₈O₄ )n

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n = 1

Molecular formula = C₅H₈O₄.

3 0
2 years ago
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