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SSSSS [86.1K]
3 years ago
14

Nén một hỗn hợp khí gồm 3,0 mol nitơ và 7,0 mol hiđro trong một bình kín, phản ứng có sẵn chất xúc tác thích hợp và nhiệt độ của

bình được giữ không đổi ở 450oC. Sau phản ứng thu được 8 mol một hỗn hợp khí.
(a) Tính hiệu suất phản ứng tổng hợp NH3.

(b) Tính thể tích khí amoniac được tạo thành (ở đktc)
Chemistry
1 answer:
Rudik [331]3 years ago
8 0
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21 is ionic aicid only one 1 know

3 0
3 years ago
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Arrange the colors of light in the visible spectrum in order of decreasing frequency.
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Visible lights in order of decreasing frequency:

Voilet > Indigo > Blue > Green > Yellow > Orange > Red

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5 0
3 years ago
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A carbon-12 atom has a mass of 12.00000 amu. The mass of a proton is 1.00728 amu, and the mass of a neutron is 1.00866 amu. How
9966 [12]
<span>A carbon - 12 atom and a regular carbon atom would have the same number of protons which is 6. So a carbon - 12 atom would have 6 protons. Both, however, would differ in the number of neutrons. Carbon - 12 atom has 6 neutrons. To determine the mass defect of a carbon - 12 atom, we have to add the total mass of protons and the total mass of neutrons and subtract the known mass of a carbon - 12 atom. That would be like this.<span>
6 (1.00728 amu) + 6 (1.00866 amu) = x
<span>6.04368 amu<span> + 6.05196 amu = x</span></span>
12.09564 amu = x

Then subtract it with 12 amu to get the defect mass

12.09564 amu - 12.00000 amu = y
0.09564 amu = y

<span>So the defect mass would be 0.09564 amu.</span></span></span>
6 0
3 years ago
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Describe three different samples that can be used to test for poisons? What are the advantages and disadvantages of these sample
Gemiola [76]

Answer: Three samples that can be used to test for poisons are blood samples, hair samples, and gastric contents samples.

Advantages of hair samples area is that it can indicate past exposure to toxins or poisons and also provide information on how long the exposure has been going on. Poisons can sometimes be detected in hair for long periods of time. The advantages of gastric contents samples area is it shows whether the poison was digested or not. An advantage of blood samples is that it’s the most useful toxicological samples. The disadvantage of hair samples is that the results can be tainted by external sources. The disadvantage of gastric content samples is that it doesn’t always show which toxin was digested. The disadvantage of blood samples is if taken near or from the heart it may have artificially high levels of toxins that wouldn’t reflect the amount distributed throughout the body at the time of death.

Explanation:

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When the equation: __Fe2O3(s) + __CO(g) → __Fe(l) + __CO2(g) is correctly balanced using the smallest whole numbers, the coeffic
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Fe2O3+3CO= 2Fe +3CO2 is the balanced equation
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4 years ago
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