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3 years ago

1 point

Chemistry

2 answers:

I am Lyosha [343]3 years ago

8 0

$65.47 \: g \times \frac{12 \: donuts}{25.64 \: g} = 30.64118565$

$i \: have \: 31 \: donuts$

yawa3891 [41]3 years ago

3 0

Answer:

30. 6 so 31 donuts

Explanation:

12d→ 25.64g

xd → 65.47g

SO cross multiply or 65.47g ÷ 25.64g. Which gives 2. 55g then divide by 12 to get 30.6 for X. If you want to check the answer substitute X with 31 and see if you get the 6547g

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13. Would you expect oxygen to form a cation or anion? How many electrons would it gain or lose? Why?

netineya [11]

Answer: C)Anion, it would gain 2 electrons to satisfy the octet rule.

Explanation:

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The electrons are filled according to Afbau's rule in order of increasing energies and thus the electronic configuration of oxygen with 8 electrons is

$O:8:1s^22s^22p^4$

The cation is formed by loss of electrons and anions are formed by gain of electrons.

In order to complete its octet and get stable, it gains 2 electrons and thus would form an anion.

$O^{2-}:10:1s^22s^22p^6$

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kvv77 [185]

Answer:

9.2

Explanation:

Let's do an equilibrium chart of this reaction:

2NO(g) + O₂(g) ⇄ 2NO₂(g)

4.9 atm 5.1 atm 0 Initial

-2x -x +2x Reacts (stoichiometry is 2:1:2)

4.9-2x 5.1-x 2x Equilibrium

The mole fraction of NO₂ (y) can be calculated by the Raoult's law, that states that the mole fraction is the partial pressure divided by the total pressure:

y = 2x/(4.9 - 2x + 5.1 -x + 2x)

0.52 = 2x/(10 - x)

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2.52x = 5.2

x = 2.06 atm

Thus, the partial pressure at equilibrium are:

pNO = 4.9 -2*2.06 = 0.78 atm

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Thus, the pressure equilibrium constant Kp is:

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Kp = [(4.12)²]/[(0.78)²*3.04]

Kp = [16.9744]/[1.849536]

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3 years ago

3.0 cm x 4.0 cm x 1.0 cm [?]cm^3

CaHeK987 [17]

Explanation:

Hi there!!

you asked to multiply these all right,

you can simply multiply it ,

=3cm × 4 cm × 1cm

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Therefore, theanswer is 12 cm^3.

Hope it helps..

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