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murzikaleks [220]
3 years ago
10

A reaction is expected to produce 28.3 moles of hydrogen gas. If the hydrogen is collected at 297 K and 1.08 atm, what is the vo

lume? 305 L H2 639 L H2 948 L H2 1,240 L H2
Chemistry
2 answers:
Scrat [10]3 years ago
8 0

Answer:

639 L H2

Explanation:

took the quiz

ur welcome

Vinil7 [7]3 years ago
4 0

Answer:

The correct answer is 639 L H₂

Explanation:

We use the ideal gas equation:

We have the following data:

n = 28.3 mol

T= 297 K

P= 1.08 atm

R= 0.082 L.atm/K.mol (gas constant)

We introduce the data in the gas equation to calculate the volume (V):

PV=nRT

⇒V =nRT/P = (28.3 mol x 0.082 L.atm/K.mol x 297 K)/(1.08 atm) = 638.2 L ≅ 639 L

Therefore, the correct option is  639 L H₂

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An inexpensive and accurate method of measuring the quantity of electricity flowing through a circuit is to pass the current thr
Paha777 [63]

Total of 127.013 C of charge is passed

Given

 weight of Ag solution before current has passed = 1.7854 g

  weight of Ag solution after current has passed = 1.8016 g

  Molecular mass of Ag = 107.86 g

  Faraday's Constant = 96485

First of all we have to apply Faraday's First Law of Electrolysis i.e

         m = ZQ

  where

Z is propotionality constant (g/C)

Q is charge (C)

Hence,

 Z = Atomic mass of substance/ Faraday's Constant

    = \frac{107.86 g}{96485 C}

    = 0.0011178 g/C

Now ,

   change in mass before and after the passing of current (Δm)

       Δm = 1.8016g-1.7854g

             =   0.0162g

    Now  amount of coulombs passed = \frac{0.142g}{0.0011178 g/C }

          amount of coulombs passed = 127.03524 C

Thus from the above conclusion we can say that amount of coulombs have passed is 127.03524 C

Learn more about Electrolysis here: brainly.com/question/16929894

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7 0
2 years ago
In which of the following reactions will Kc = Kp? Group of answer choices N2(g) + 3 H2(g) 2 NH3(g) N2O4(g) 2NO2(g) CO(g) + 2 H2(
Artist 52 [7]

Answer:

H₂(g) +I₂(g) ⟶ 2HI(g)

Explanation:

Kc =Kₚ when the number of moles of gaseous products equals the number of moles of gaseous reactants.

The HI reaction has two moles of gas on each side of the reaction arrow.

K = (Products)ⁿ/(Reactants)ⁿ = (Products/Reactants)ⁿ

Thus, if n is the same for products and reactants, you will get the same number whether you use concentrations or pressures, and Kc = Kₚ

8 0
3 years ago
A computed tomography (CT) scan fires radiation through the body to create an image. What type of radiation does a CT scan use?
Kaylis [27]

image created by sending electromagnetic radiation through body parts, solid parts appear white


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5 0
3 years ago
Iron(III) oxide is formed when iron combines with oxygen in the air.
Alisiya [41]

Answer:

Mass = 9.58 g  

Explanation:

Given data:

Mass of Fe₂O₃ formed = ?

Mass of Fe = 6.7 g

Solution:

Chemical equation:

4Fe + 3O₂        →    2Fe₂O₃

Number of moles of Fe:

Number of moles = mass/molar mass

Number of moles = 6.7 g/ 55.8 g/mol

Number of moles = 0.12 mol

now we will compare the moles of Fe and Fe₂O₃.

                         Fe         :          Fe₂O₃

                           4         :              2

                         0.12       :          2/4×0.12 = 0.06 mol

Mass of Fe₂O₃:

Mass = number of moles × molar mass

Mass = 0.06 mol  × 159.69 g/mol

Mass = 9.58 g  

8 0
3 years ago
What does the kinetic theory state about the kinetic energy of gas molecules?
Verizon [17]
The kinetic theory states that potential energy in a gas is low but has high potential energy and they move around fast, Say in a solid it has more potential energy but less kinetic.
6 0
3 years ago
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