Which sample of water contains particles having the highest average kinetic energy ?

Answers

Answer 1

Answer: 25mL if water as the highest average of the kinetic energy

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Gabriella weighs 450 N. She climbs a flight of stairs to a height of 3 m. It takes her 5 seconds. How much work does Gabriella do when she climbs the stairs?A.
150 J

B.
270 J

C.
1350 J

D.
2250 J

Answers

The formula that can be applied in this problem is W = Fd where W is work, F is the force and d is distance. You have 450N and 3m, all you have to do is to multiply it.

W = Fd

W = (450N) (3m)

W = 1350J

The answer is letter C.

12a. Do i need to find the morality of each ion in the solution to get to the moles? Or do i just do AlCl3

Answers

You just use the morality of the solution, you found out that you have 0.0046mol (about 0.005mol0 of AlCl3, so then since there is 1 Al in a single molecule, you have the number of moles of aluminum, but since there is Cl3 (3 atoms of chlorine per molecule), just multiply the number of moles of molecules by the number of atoms of that type inside a single molecule, to get [Cl-] = 0.0138mol (or round to 0.014)

A substance has a melting point of 0 degrees C and a boiling point of 100 degreesc. The substance is most likely
a. Water
b. Hydrogen
c. Gold
d. Table salt

Answers

water. Just something you need to memorize

Water for sure.

100 degrees Celsius is 212 degrees Fahrenheit

0 degrees Celsius is 32 degrees Fahrenheit.

Be sure to remember that for future events! :)

2.The image below shows two nitrogen atoms. For these two atoms to form a stable molecule, N2, how many electrons would have to be part of covalent bonds?

Answers

D. 6 electrons

A single nitrogen atom has five electrons in its outer energy level to start, and will be most stable with an octet, or 8 electrons in its outer level.

Since N2 is a covalent bond, the lewis dot structure of N2 would have a triple bond. Each bond contains 2 electrons, so if it has a triple bond it contains 6 electrons.
Calculate the number of valence electrons of N2
N= 2x 5 = 10
N2 has a total of 10 valence electrons, to become stable each N atom needs 8 electrons.
So, therefore, 6 electrons would have to be a part of covalent bonds because they share 6 electrons in a triple bond.

A maritime polar air mass is a cold air mass that forms over which two oceans

Answers

Answer:

The correct answer is Pacific and Atlantic oceans.

Explanation:

When an air body of a specific site or region reflects the temperature and other climatic condition of water and land it is known as air mass. The air substitutes heat with the water or the land, till the temperature of the air becomes equivalent to that of the surface underneath it. A maritime polar air mass refers to the air mass, which gets produced over the Northern Pacific oceans and the Northern Atlantic oceans. This is accountable for bringing a mass of cold air into the mentioned oceans.

northern atlantic and northern pacific oceans

After being thoroughly stirred at 10.°C, which mixture is heterogenous?(1) 25.0 g of KCl and 100. g of H2O(2) 25.0 g of KNO3 and 100. g of H2O
(3) 25.0 g of NaCl and 100. g of H2O
(4) 25.0 g of NaNO3 and 100. g of H2O

Answers

The answer is (2) KNO3. This depends on the solubility of these four compounds at 10℃. For NaCl, it is 35.8 g, For NaNO3, 80.8 g. KCl, 31.2 g. KNO3, 21.9g. So only KNO3 is less than 25.0 g.

Answer:

Explanation:

Because if look at the Solubity curves you will notice other three doesn't go 25 grams. They start above the 25 grams.

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