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miv72 [106K]
3 years ago
8

PLZ HELP! Give me a really (winner) good idea for a kids science fair! My little sister has to do one through my school and I ne

ed an idea for her!
100 points and brainiest for the best idea!
Chemistry
1 answer:
OverLord2011 [107]3 years ago
8 0

Explanation:amiga

te

extrañar

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For each set of values, calculate the missing variable using the ideal gas law.
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Answer:

1. n = 0.174mol

2. T= 26.8K

3. P = 1.02atm

4. V = 126.88L

Explanation:

1. P= 2.61atm

V = 1.69L

T = 36.1 °C = 36.1 + 273= 309.1K

R = 0.082atm.L/mol /K

n =?

n = PV / RT = (2.61x1.69)/(0.082x309.1)

n = 0.174mol

2. P = 302 kPa = 302000Pa

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V = 2382 mL = 2.382L

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R = 0.082atm.L/mol /K

T= PV /nR = (2.98x2.382)/(3.23x0.082) = 26.8K

3. P =?

V = 0.0250 m³ = 25L

T = 288K

n = 1.08mol

R = 0.082atm.L/mol /K

P = nRT/V = (1.08x0.082x288)/25 = 1.02atm

4. P = 782 torr

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3 years ago
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prisoha [69]
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Which postulate of Dalton's atomic theory was later proven wrong?
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Option c and d

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The 5 postulates of Daltons' atomic theory are:

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2. Atoms of different elements combine to form compounds

3. Compounds contain atoms in small whole-number ratios

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