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mr Goodwill [35]
3 years ago
9

Can anyone answer this? I'd appreciate it. :0

Chemistry
2 answers:
Ganezh [65]3 years ago
8 0

Answer:

Triclinic crystal forms. Also known as the rhombohedron system, its shape is three dimensional like a cube, but it has been skewed or inclined to one side making it oblique. All crystal faces are parallel to each other. A rhombohedral crystal has six faces, 12 edges, and 8 vertices.

bascially short answer is 6 faces

Tom [10]3 years ago
6 0

Answer: The answer is C. 6 faces

Explanation:

The answer is 6 faces because think about how many sides a 3 dimentional square has, and once I figures that out I'm left with the anser 6.

Hope this helped (:

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7 0
3 years ago
Zinc metal is added to hydrochloric acid to generate hydrogen gas and is collected over a liquid whose vapor pressure is the sam
mafiozo [28]

Question:

Zinc metal is added to hydrochloric acid to generate hydrogen gas and is collected over a liquid whose vapor pressure is the same as pure water at 20.0 degrees C (18 torr). The volume of the mixture is 1.7 L and its total pressure is 0.987 atm. Determine the number of moles of hydrogen gas present in the sample.

A. 0.272 mol

B. 0.04 mol

C. 0.997 mol

D. 0.139 mol

E. 0.0681 mol

Answer:

The correct option is;

E. 0.0681 mol

Explanation:

The equation for the reaction is

Zn + HCl = H₂ + ZnCl₂

Vapor pressure of the liquid = 18 torr = 2399.803 Pa

Total pressure of gas mixture H₂ + liquid vapor = 0.987 atm  

= 100007.775 Pa

Therefore, by Avogadro's law, pressure of the hydrogen gas is given by the following equation

Pressure of H₂ = 100007.775 Pa - 2399.803 Pa = 97607.972 Pa

Volume of H₂ = 1.7 L = 0.0017 m³

Temperature = 20 °C = 293.15 K

Therefore,

n = \frac{PV}{RT} =  \frac{100007.775 \times 0.0017 }{8.3145 \times 293.15} = 0.068078 \ moles

Therefore, the number of moles of hydrogen gas present in the sample is n ≈ 0.0681 moles.

7 0
3 years ago
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Answer:

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copper + silver nitrate → copper nitrate + silver

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3 0
3 years ago
Please help!! I'll give 50 points
Zinaida [17]

Answer:

The equilibrium will shift to the right.

Explanation:

  • Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

For the reaction: <em>CH₄ + NH₃ + 1.5O₂ ⇄ HCN + 3H₂O.</em>

<em></em>

Adding NH₃ to the reaction:

  • Adding NH₃ will increase the concentration of the reactants side, so the reaction will be shifted to the right (products) side to suppress the increase in the concentration of NH₃.
3 0
3 years ago
What is the next atomic orbital in the series below? 1s, 2s, 2p, 3s, 3p, ___
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7 0
3 years ago
Read 2 more answers
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