CHEMISTRY HIGH SCHOOL

The molar heat of fusion for water is 6.01 kJ/mol. How much energy is released when 36.8 g of water freezes at its freezing point?

Answers

Answer 1
Answer:

The answer there is 12.3 kJ. First you have to calculate the amount of heat released (n) based on the given. Just multiply 36.8 grams of water to a mole of water per 18.015 grams, which will give you 2.04 moles of H2O. Using the formula heat released (q) = number for moles of the substance (n) multiplied to the molar enthalpy of fusion of the substance (H), you will have the (2.04 mole)(-6.01 kJ/mole), giving you an answer of -12.3kJ.
Answer 2
Answer:

Answer:

12.3 kJ

Explanation:

Related Questions

In which block of the periodic table is chromium (Cr) found?
Please help me fill this all out! (Will give brainliest and a heart) This has to do with the fight or flight response.
A student gains 1.0 lb in two weeks. How many grams did he gain?Express your answer to two significant figures and include the appropriate units.I don’t know
Which of the following would most likely act as a Bronsted-Lowry acid?
In the electron cloud model, if you begin at the electron shell closest to the nucleus of an atom and move out, what is the number of electrons that each energy level or electron shell needs to fill the first four electron shells?A. 2, 6, 10, 14 B. 2, 8, 18, 32 C. 8, 8, 8, 8

Which one of the following equations is not balanced?6H2O + 6CO2 ---> C6H12O6 + 6O2
C7H16 + 11O2 ---> 7CO2 + 8H2O
PCl2 + 4H2O --->H3PO4 + 5HCL
Fe3O4 + 4H2 ---> 3Fe + 4H2O

Answers

The key inthe balancing of chemical reaction is to make sure that you got the exactchemical formula of the substance that is reacting and the yielded product.After getting the formula, identify first the hardest element/atom to bebalanced such as Na, Zn, Cl, C, O, etc. Then proceed to the easier ones such asO, H. Make sure to note the atoms present in the molecule of the substance. Amongthe three equations, PCl2 + 4H2O --->H3PO4 + 5HCL is not balanced. Thehardest element here is the Cl. Observe that there are 5Cls in the product sideso you must add 5 to the PCl2. However, there are only 2Cl atoms and it needs3 to balance the equation. Also, there is no P in the product side. This equationis invalid.
The third one is incorrectly balance because the are only two chlorine on the reactant side and five on the product side. The correct balanced equation is 2PCL2 + 8H2O -> 2H3PO4 + 5H2 + 4Cl. The reason HCl is broken into two parts is because it is a strong acid and would immediately dissolve if put together.

What are synonyms for the word control?

Answers

Answer:

Rule, oversee, discipline

Explanation:

hope it helped!
Thesaurus.com is great for answers like this but a few common ones are power, command, authority, jurisdiction, and sway

H-H-C=C-H-H + Br—Br —> H-H-Br- C-C-H-Br-H

Answers

Answer:

Complexity.

Explanation:

Okay, I am NOT explaining this whole thing, but simply, C2n product.

Don't ask. Just don't.

1. In general, the nucleus of a small atom is stable. Therefore, over very short distances, such as those in a small nucleus, a. the strong nuclear force is much greater than the electric force.
b. the electric force is much greater than the strong nuclear force.
c. the strong nuclear force equals the electric force.
d. the strong nuclear force and the electric force are both attractive.
9. Uranium-238 undergoes alpha decay. Therefore, uranium-238 will
a. remain stable.
b. change into a different element altogether.
c. emit neutral particles and no energy.
d. none of the above

Answers

1. Answer;

a. the strong nuclear force is much greater than the electric force.

Explanation;

  • For an atom to be stable it means it has enough amount of binding energy to hold its nucleus together permanently.
  • Therefore, an unstable atom lacks enough amount of binding energy to hold its nucleus permanently and thus undergoes decay to achieve stability. Unstable atoms are therefore referred to being radioactive.
  • Small atoms are stable; this is because they have equal number of protons and neutrons and thus the protons and neutrons fill up energy levels while maximizing the strong force binding the nucleus together.

9. Answer;

b. change into a different element altogether.

Uranium-238 undergoes alpha decay. Therefore, uranium-238 will  change into a different element altogether.

Explanation;

  • Unstable atoms undergo radioactive decay in order to achieve stability of their nucleus.
  • Uranium-238 is an example of such atom, which may undergo decay to achieve stability.
  • Alpha decay is one of the types of decays, others being beta decay and gamma decay. In alpha decay the radioactive isotope undergoes decay such that its mass number is decreased by four and its atomic number is decreased by two.
  • Therefore, Uranium-238 undergoes alpha decay to form a different element whose mass number is 234 and atomic number is 90, known as thorium-234.
1. In general, the nucleus of a small atom is stable. Therefore, over very short distances, such as those in a small nucleus,

a. the strong nuclear force is much greater than the electric force.


9. Uranium-238 undergoes alpha decay. Therefore, uranium-238 will


b. change into a different element altogether.

Hope these answer the questions. Have a nice day.

What is the best way to study for a test/quiz

Answers

Answer:

the beat way i use is to have someone quiz you on what your studying for, and anything you het wrong you work on more.

What is the maximum number of covalent bonds that can be formed by one carbon atom? 1 2 3 4

Answers

The maximum number of covalent bonds formed by a single carbon atom is 4
Other Questions
Which polyatomic ion contains the greatest number of oxygen atoms?(1) acetate (3) hydroxide(2) carbonate (4) peroxide
What is the reaction between aspirin and hydrochloric acid
A snake slithers up a giant sand dune at 2 meters per second.How far will it have moved in a minute?
A sample of nitrogen occupies 10.0 liters at 25°C and 98.7 kPa. What would be the volume at 20°C and 102.7 kPa?