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
Elena L [17]
2 years ago
14

5. Given the reaction:

Chemistry
1 answer:
Alja [10]2 years ago
6 0

Answer:

48 g of oxygen is needed to produced 54 g of water.

Explanation:

Given data:

Mass of O₂ = ?

Mass of H₂O = 54 g

Chemical equation:

O₂  + 2H₂  → 2 H₂O

Number of moles of H₂O:

Number of moles of  H₂O= Mass /molar mass

Number of moles of H₂O= 54 g / 18/mol

Number of moles of  H₂O= 3 mol

Now we will compare the moles of water with  oxygen .

                 H₂O             :            O₂

                  2                 :             1

                  3                  :            1/2 × 3 =1.5

              

The 3 moles of H₂O produced by 1.5 moles of oxygen.

Mass of O₂  :

Mass of O₂  :  = number of moles × molar mass

Mass of O₂  : = 1.5 mol ×32 g/mol

Mass of O₂  :  = 48 g

You might be interested in
The colour imparted to a flame by calcium ion?
emmainna [20.7K]
The flame goes an Orange-Red colour.
6 0
3 years ago
How many forces act on each person? When they put there hands together or High five
EastWind [94]

Answer:

Left and right: two forces

Total: four forces

Explanation:

If it's just the forces that they are using it would be two the force of each person's hand on the other. However there is also gravity pulling down on their hand but they use another force to pull it up which you can call the normal force.

if this helped please hit the thanks button <3

6 0
3 years ago
Read 2 more answers
In a chemical reaction, the difference between the potential energy of the products of the potential energy of the reactants is
Svetradugi [14.3K]
Your question looks a bit incomplete as you have the same contents in options a) and d). According to your list, I can't see the correct answer, but I can give you one.The difference between the potential energy of the products of the potential energy of the reactants is equal to the enthalpy of the reaction.
7 0
3 years ago
Read 2 more answers
What is the correct answer?
aksik [14]
I think the answer is c
5 0
3 years ago
In the animation, you can see that the electrons occupy different orbitals according to the energy level of each orbital. A sing
lara31 [8.8K]

B) The He atom has two electrons that have parallel spin in its 1s orbital.

C) Electrons generally occupy the lowest energy orbital first.

D) The arrangement of the orbitals is the same in a multielectron atom and a single-electron atom

E) The C atom has two unpaired electrons.

Explanation:

In writing sublevel notations certain rules are followed:

  • The maximum number of electrons in the orbitals of sublevels are:

             two for s-sublevel with one orbital

             six for p-sublevel with three orbitals

             ten for d-sublevel with five orbitals

             fourteen for f-sublevel with seven orbitals

  • Aufbau's principle states that sublevels with lower energies are filled before those with higher energies.

                    1s 2s 2p 3s 3p 4s 3d 4p 5s    increasing order of filling

  • Pauli exclusion principle states that no two electrons can have the same set of the four quantum numbers i.e electrons in the same orbital cannot spin in the same direction.
  • Hund's rule states that electrons go into degenerate orbitals singly first before pairing up.

Based on these principles and the animation, the following options are correct:

B) The He atom has two electrons that have parallel spin in its 1s orbital.

Helium has two electrons in the 1s orbital. From Pauli's exclusion principle, we see that the two electrons cannot spin in the same way. Therefore, they have parallel spin

C) Electrons generally occupy the lowest energy orbital first.

From Aufbau's principle, electrons go into orbitals with lower energies first before those with higher energies.

D) The arrangement of the orbitals is the same in a multi-electron atom and a single-electron atom

                  1s 2s 2p 3s 3p 4s 3d 4p 5s

Orbitals are arranged in the order of their energies from the lowest to the highest.

E) The C atom has two unpaired electrons.

Configuration for carbon atom is shown below:

                            1s² 2s² 2p²

Learn more:

Orbitals brainly.com/question/1832385

#learnwithBrainly

8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the total number of neutrons in an atom of aluminum-27?
    5·1 answer
  • When might a technique called water displacement be used?
    5·1 answer
  • The boiling point of ethanol is 78 °C. The molar heat(i.e., enthalpy)of vaporization of ethanol is 38.6 x 103J/mol. What is the
    8·1 answer
  • How can a mixture of sand and water be separated? chromatography magnetic attraction filtration crystallization
    9·1 answer
  • What is very fine sediment called
    14·2 answers
  • At constant temperature and pressure, 5.0 L of SO2 is
    12·1 answer
  • A 225 g sample of an unknown solid is heated 67C and placed into a calorimeter containing 25.6 g of water at 15.6°c. If the fina
    10·1 answer
  • I NEED HELP ASAP PLEASE I BEG
    8·1 answer
  • After extended stirring of a spatula sized portion of a solid drug in 100 mL of water, the drug appeared to be insoluble. Yet wh
    8·1 answer
  • Please help me ASAP! Thank you!
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!