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DENIUS [597]
3 years ago
15

HURRYYY!!!!!!!!!!

Chemistry
1 answer:
vlabodo [156]3 years ago
8 0

Im not sure but i think its 350. I really hope im right

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An organic compound is 61.5% C, 2.56% H and 35.9% N by mass. 2.00 grams of this gas is entered into a 300.0 mL flask and heated
pashok25 [27]

Answer:

C₄H₂N₂

Explanation:

First we<u> calculate the moles of the gas</u>, using PV=nRT:

P = 2670 torr ⇒ 2670/760 = 3.51 atm

V = 300 mL ⇒ 300/1000 = 0.3 L

T = 228 °C ⇒ 228 + 273.16 = 501.16 K

  • 3.51 atm * 0.3 L = n * 0.082atm·L·mol⁻¹·K⁻¹ * 501.16 K
  • n = 0.0256 mol

Now we<u> calculate the molar mass of the compound</u>:

  • 2.00 g / 0.0256 mol = 78 g/mol

Finally we use the percentages given to<em> </em><u>calculate the empirical formula</u>:

  • C ⇒ 78 g/mol * 61.5/100 ÷ 12g/mol = 4
  • H ⇒ 78 g/mol * 2.56/100 ÷ 1g/mol = 2
  • N ⇒ 78 g/mol * 35.9/100 ÷ 14g/mol = 2

So the empirical formula is C₄H₂N₂

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3 years ago
Will a horse galloping in a field produce and average velocity of zero
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Answer:

No

Explanation:

Depending on the mass of the horse and the speed, velocity will change.

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Which of the following chemical equations is balanced?
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Which one of the following species is diamagnetic: a. F b. Zn2+ C. Cu2+ d. Ca+​
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The correct answer to this question is C

Explanation:

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