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
loris [4]
3 years ago
15

Determine the overall energy change for the reaction between hydrogen and oxygen shown in Question 13. Use Figure 2.

Chemistry
1 answer:
zimovet [89]3 years ago
5 0

Answer:

–500KJ

Explanation:

Data obtained from the question include the following:

Heat of reactant (Hr) = 800KJ

Heat of product (Hp) = 300KJ

Enthalphy change (ΔH) =..?

The enthalphy change is simply defined as the difference between the heat of product and the heat of reactant i.e

Enthalphy change = Heat of product – Heat of reactant

ΔH = Hp – Hr

With the above formula, we can easily calculate the enthalphy change as follow

ΔH = Hp – Hr

ΔH = 300 – 800

ΔH = –500KJ.

Therefore, the overall energy change for the reaction between hydrogen and oxygen shown in the diagram above is –500KJ

You might be interested in
What is the solubility of Na2HAsO4 at 60 degrees C
nlexa [21]
C. 65g / 100ml of water
6 0
3 years ago
What is produced in the electrolysis of brine?
ziro4ka [17]

High concentration of water and salt is the main ingredient of brine. Salt being NaCl and water make brain and important solution in making of chlorine.

Electric terminals are put inside the solutions and with the help of electric current the chemical properties of the solution are changed such that we get chlorine as outcome. This process is carried out in a large scale to get chlorine from NaCl in solution and is called electrolysis of Brine.

7 0
3 years ago
4. How many atoms are in 32.6 g of Oxygen?
Natali5045456 [20]

Hey there!

Oxygen has a molar mass of 16. That means 16g of oxygen is 1 mole.

32.6 ÷ 16 = 2.0375 moles

We have 2.0375 moles.

There are 6.022 x 10²³ atoms in one mole.

2.0375 x 6.022 x 10²³

1.3 x 10²⁴

There are 1.3 x 10²⁴ atoms in 32.6 grams of oxygen.

Hope this helps!

7 0
3 years ago
Read 2 more answers
the development and use of the ______ a common and important piece of laboratory equipment, led scientist to the discovery of se
Liula [17]

The answer is the Microscope.

6 0
3 years ago
I really need help pls, will pay anything
Triss [41]

Explanation:

For the first part,

 Reaction equation:

         N₂  +  3H₂   →   2NH₃

Given:

Number of moles of NH₃  = 6 moles

Unknown:

Number of moles of N₂  = ?

Solution:

   N₂  +  3H₂   →   2NH₃;

  From the reaction above, we solve from the known specie to the unknown. Ensure that the equation is balanced;

         2 moles of NH₃ is produced from 1 mole of N₂

        6 moles of NH₃ will be produced from \frac{6}{2}  mole of N₂

                                                                      = 3moles of N₂

The number of moles of N₂ is 3 moles

ii.

Given parameters:

Number of moles of sulfur = 2.4moles

Molar mass of sulfur  = 32.07g/mol

Unknown:

Mass of sulfur  = ?

Solution:

The number of moles of any substance can be found using the expression below;

 Number of moles  = \frac{mass}{molar mass}

  Mass of sulfur  = number of moles of sulfur x molar mass

Insert the parameters and solve;

    Mass of sulfur  = 2.4 x 32.07  = 76.97g

6 0
3 years ago
Other questions:
  • What will happen when substances go through chemical changes
    8·1 answer
  • Please answer this question only if you know the answer! 30 points and brainliest!
    5·2 answers
  • Which of these is a base? a-vinegar b-ammonia c-HCl d- HNO3
    5·2 answers
  • What is the number of millimoles of H+ in 1.653 mmol of oxalic acid dehydrate?Remember that oxalic acid is diprotic.
    11·1 answer
  • What electron subshell is being filled for the rare earth series of elements on the periodic table? What electron subshell is be
    8·1 answer
  • You have a 5-liter container with 2.00 x 1023 molecules of ammonia gas (NH3) at STP
    11·1 answer
  • An acid and a base react to form salt and water. Which of the following best describes this type of chemical reaction? Redox Neu
    12·2 answers
  • PLEASE HELP
    14·1 answer
  • Convert the following temperature to c 67k b) 1671k
    13·1 answer
  • Fill in the products for the dissociation of the strong acid hno3 in water.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!