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Reil [10]
3 years ago
15

Ammonia chemically reacts with oxygen gas to produce nitric oxide and water . What mass of water is produced by the reaction of

of ammonia? Be sure your answer has the correct number of significant digits.
Chemistry
1 answer:
Kay [80]3 years ago
4 0

Full Question:

Ammonia chemically reacts with oxygen gas to produce nitric oxide and water. What mass of water is produced by the reaction of 7.7g of ammonia?

Be sure your answer has the correct number of significant digits.

Answer:

12.23g ≈ 12g (2 s.f)

Explanation:

Ammonia chemically reacts with oxygen gas to produce nitric oxide and water. The balanced chemical reaction is given as:

4 NH3 + 5 O2 ------->  4 NO + 6 H2O

From the reaction;

4 mole of ammonia reacts to produce 6 moles of water

From the question;

Moles = mass / molar mass

From the question;

moles of ammonia = mass / molar mass = 7.7 / 17 = 0.4529moles

Number of moles of water produced;

4 = 6

0.4529 = x

x = (0.4529 * 6 )  / 4

x = 0.67935moles

Mass of water =  moles * molar mass = 0.67935 * 18 = 12.23g ≈ 12g (2 s.f)

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rodikova [14]

Answer:

Somatotropin(Growth Hormone)

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3 0
3 years ago
Please help! Ionic and covalent compound.
mrs_skeptik [129]
21) Ionic
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These answers are based on if there was a nonmetal and nonmetal it’s Covalent and if there was a metal and nonmetal it was Ionic I didn’t use the electro negativity for the answers that has more than two elements, if the answers had more than two elements they have a ? Next to their answer.

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3 0
2 years ago
A student researcher performed a chromatographic separation of caffeine and aspartame. The retention time for caffeine, t c , wa
KatRina [158]

Answer:

Average plate height: 67,4μm

Resolution: 3,10

Resolutin with increase N by a factor of 1,5: 3,80

Explanation:

Average plate height is the average between plate height of aspartame and caffeine.

Plate height is:

H = \frac{L}{16(\frac{t_R}{W} )^2}

For aspartame: H = \frac{0,241x10^{6}um}{16(\frac{267,1s}{18,9s} )^2}

H = 75,4 μm

For caffeine: H = \frac{0,241x10^{6}um}{16(\frac{216,7s}{13,6s} )^2}

H = 59,33 μm

Average plate height is:

(59,3μm + 75.4μm)/2= <em>67,4μm</em>

The resolution formula is:

R = \frac{2(t_{R2}-t_{R1})}{(w_2+w_1)}

Replacing:

R = \frac{2(267,1s-216,7s)}{(18,9s+13,6s)}

<em>R = 3,10</em>

<em></em>

As resolution is proportional to the square root of the number of theoretical plates, the increasing of 1,5 in the number of theoretical plates increases the resolution by a factor of √1,5 ≈ 1,22

That means resolution would be:

R 1,5N = 3,10×√1,5= <em>3,80</em>

<em />

I hope it helps!

5 0
3 years ago
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Travka [436]

Answer:

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8 0
3 years ago
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kondaur [170]

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