CHEMISTRY HIGH SCHOOL

Which of the following statements about ice melting is true?a. Water molecules move into a fixed position.
b. Energy flows from the surroundings to the ice.
c. Water molecules lose energy.
d. The temperature of the ice increases as it melts

Answers

Answer 1
Answer: The statement about ice melting that is true is that the temperature of the ice increases as it melts. The answer is letter D. The rest of the choices do not answer the question above.

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What is atomic mass measured in on the periodic table?

Answers

the atomic mass of an element,  is measured in amu

Atoms A and X are fictional atoms. Suppose that the standard potential for the reduction of X^2+ is +0.51 V, and the standard potential for the reduction of A^2+ is -0.33. Find the standard potential for an electrochemical cell with the cell reaction that follows.

Answers

While the reaction is not shown, based on those atoms and reduction potentials, the only reasonable favorable equation we can form is:

A(2+) + X -> A + X(2+)

The standard reduction potential for the cell is the cathode's reduction potential minus the anode's reduction potential, or 0.51-(-0.33)=0.84.

If 31.8 grams of LiCl are dissolved in 225 grams of water, what is the concentration of the solution in percent by mass?

Answers

Percent by can be calculated by dividing the amount of solute by the total grams of the solution to be made so the sum of water and the amount solute. We calculate as follows:

% by mass = 31.8 g LiCl / 225 g water + 31.8 g LiCl x 100%
% by mass = 12.38%

What is the correct way to represent 5600 L using scientific notation?–5.6 mc031-1.jpg 103 L
–5.6 mc031-2.jpg 10–3 L
5.6 mc031-3.jpg 10–3 L
5.6 mc031-4.jpg 103 L

Answers

To answer this you first must know that the value before the x10^n must be below 10 and equal or greater than 1. All the choices are valid with respect to this law. Next, 5600L is positive canceling the first 2 choices. The last value is the answer since multiplying a value with 10^3 makes a larger number or moves the decimal place to the right 3 places. 

The correct way to represent 5600 L using scientific notation is written as 5.6 x 10³ L.

What is Scientific notation?

Scientific notation or standard form is method of representing large numbers in more condensed form using power of ten.

The correct way to represent 5600 L using scientific notation is written as follows;

5600 L = 5.6 x 10³ L

Thus, the correct way to represent 5600 L using scientific notation is written as 5.6 x 10³ L.

Learn more about scientific notation here:brainly.com/question/325572

When a liquid is cooled, the kinetic energy if the particles A. Decrease B. Increases C. Remains the same. The force of attraction between the particles A. Decrease B. Increases C. Remains the same , the space between the particles A. Decrease B. Increases C. Remains the same

Answers

Answer:

  • (A.) Kinetic energy decreases
  • (B.) Force of attraction increases
  • (C.) Space between particles remains the same

Explanation:

Kinetic energy is the energy in motion. Cooling if liquid would cause decreased temperature and hence slow down the oscillation of the particles.

Likewise, increased heat reduces the force of attraction between said particles, which allowed for their free movement. So the cooling would have opposite effect.

Finally, the space between the particles would remain the same as it was originally, as their force of attraction is increased in the cooling process, they would take the form they are held in.

I hope this was helpful and concise?

As the first five elements in Group 15 areconsidered in order of increasing atomic number,
first ionization energy
(1) decreases
(2) increases
(3) decreases, then increases
(4) increases, then decreases

Answers

The correct answer is option 1. The first ionization energy, in group 15 elements in increasing atomic number, decreases. Ionization energy is the amount of energy requires to detach one electron from the atom. In the periodic table, the ionization energy decreases as one goes down.

Answer: The first ionization energy for the first five elements of Group 15 decreases.

Explanation:

Ionization energy is defined as the energy required to remove an electron from the outermost shell of an isolated gaseous atom. It is represented as E_i

X(g)\rightarrow X^+(g)+1e^-;E_i

Ionization energy decreases as we move down the group. This happens because the number of shells increases as we move down the group. The electrons are added in the new shell around the nucleus.

This results in the shielding of outermost electrons more from the inner ones, which decreases the attraction between the outermost electrons and the nucleus. Hence, the removal of electron from the outermost shell becomes easy and requires less energy.

Hence, the first ionization energy for the first five elements of Group 15 decreases.
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