1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ivan
3 years ago
15

the reaction of Al with HCl to produce hydrogen gas. What is the pressure of H2 if the hydrogen gas collected occupies 14 L at 3

00 K and was produced upon reaction of 4.5 mol of Al? Assume the yield of the reaction is 100 percent. Assume the volume, temperature, moles, and presure are actually known to three signficant figures. 1. 1.07 atm 2. 0.0763 atm 3. 0.233 atm 4. 7.91 atm 5. 11.9 atm 6. 5.28 atm
Chemistry
2 answers:
juin [17]3 years ago
6 0

Answer:

Pressure for H₂ = 11.9 atm

Option 5.

Explanation:

We determine the complete reaction:

2Al(s) +  6HCl(aq) → 2AlCl₃(aq) + 3H₂(g)

As we do not know anything about the HCl, we assume that the limiting reactant is the Al and the acid is the excess reagent.

Ratio is 2:3.

2 moles of Al, can produce 3 moles of hydrogen

Therefore 4.5 moles of Al must produce (4.5 . 3) / 2 = 6.75 moles

Now we can apply the Ideal Gases law to find the H₂'s pressure

P . V  = n . R . T → P = (n . R .T) / V

We replace data: (6.75 mol . 0.082L.atm/mol.K . 300K) / 14L

Pressure for H₂ = 11.9 atm

Likurg_2 [28]3 years ago
5 0

Answer:

The pressure of H2 is 11.9 atm (option 5)

Explanation:

Step 1: Data given

Volume of hydrogen gas = 14L

Temperature = 300 K

Moles of Al = 4.5 moles

Step 2: The balanced equation

2Al + 6HCl → 2AlCl3 + 3H2

Step 3: Calculate moles of H2

For 2 moles Al we need 6 moles HCl to produce 2 moles AlCl3 and 3 moles H2

For 4.5 moles Al we need 3*4.5 moles HCl = 13.5 moles HCl

We'll produce 4.5 moles AlCl3 and 3/2 * 4.5 = 6.75 moles H2

Step 4: Calculate pressure of H2

p*V = n*R*T

⇒with p = the pressure of H2 = TO BE DETERMINED

⇒with V = the volume of H2 = 14 L

⇒with n = the moles H2 = 6.75 moles

⇒with R = the gas constant = 0.08206 L*atm/mol*K

⇒with T = the temperature = 300 K

p = (n*R*T) / V

p = (6.75 * 0.08206 * 300 ) / 14

p = 11.9 atm

The pressure of H2 is 11.9 atm (option 5)

You might be interested in
The center portion of the atom that contains the protons and neutrons is called the _____? nucleus
Virty [35]
It's called the atomic mass
3 0
3 years ago
How is a gamete different from other types of cells in a person's body?
vagabundo [1.1K]
The human gametes differ from all the other cells in the body because the somatic cells have a complete set of chromosomes
6 0
3 years ago
One example of an ionic compound is<br><br> F2 <br> CO2<br> HBr<br> MgCL2
allochka39001 [22]
MgCl2 because it is the only option in which a metal appears with a nonmetal. In this case, the metal transfers electrons to the nonmental because the metal has a lower ionization energy.
7 0
3 years ago
Read 2 more answers
A mixture of oxygen hydrogen and nitrogen gas is exerts a total pressure of 282K PA if the partial pressures of oxygen and hydro
sergiy2304 [10]
Glgggggggggggggggggggggggg
7 0
3 years ago
Read 2 more answers
According to the ideal gas law, increasing the volume of a closed reaction container decreases the thermal energy because the
hichkok12 [17]

Answer:

b is ur answer the temputer does increase

Explanation:

8 0
3 years ago
Other questions:
  • how does the structure of atoms (i.e. protons, neutron, and electrons) affect the electric charge of an object or substance.
    8·1 answer
  • How does the rider’s ability to stop the bike change as the bike moves down a steep hill
    12·1 answer
  • Which chemical symbols will complete the equation for this single displacement reaction?
    12·2 answers
  • As the Amplitude of the wave decreases what be does the frequency do​
    15·1 answer
  • Carbonate oxidation number
    9·1 answer
  • What physical properties does lithium have
    13·1 answer
  • How is the air in tube 4 kept out of contact with the nail​
    13·1 answer
  • Using the information make a graph.
    11·1 answer
  • Why do girls like boys who act rude more than boys that are actually nice!
    10·2 answers
  • Iron has a density of 7.86g/cm^3. Could a block of metal with a mass of 18.2g and a volume of 2.56cm^3 be iron? Show work and ex
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!