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morpeh [17]
2 years ago
13

A snowflake contains 2.1 10^18 molecules of water. How many moles of water does it contain?

Chemistry
1 answer:
IgorC [24]2 years ago
6 0

Answer:

divide the # of molecules by avogadros number and get 3.48 x 10^-6

Explanation:

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Identify the type of interactions involved in each of the following processes taking place during the dissolution of sodium chlo
icang [17]

Answer:

A. Interactions between the ions of sodium chloride (solute-solute interactions).

B. Interactions involving dipole-dipole attractions (solvent-solvent interactions).

C. Interactions formed during hydration (solute-solvent interactions).

D. Interactions involving ion-ion attractions (solute-solute interactions).

E. Interactions associated with an exothermic process during the dissolution of sodium chloride (solute-solvent interactions).

F. Interactions between the water molecules (solvent-solvent interactions).

G. Interactions formed between the sodium ions and the oxygen atoms of water molecules (solute-solvent interactions).

Explanation:

The solution process takes place in three distinct  steps:  

  • Step 1 is the <u>separation of solvent molecules. </u>
  • Step 2 entails the <u>separation of solute molecules.</u>

These steps require energy input to break attractive intermolecular forces; therefore, <u>they are endothermic</u>.  

  • Step 3 refers to the <u>mixing of solvent and solute molecules.</u> This process can be <u>exothermic or endothermic</u>.

If the solute-solvent attraction is stronger than the solvent-solvent attraction and  solute-solute attraction, the solution process is favorable, or exothermic (ΔHsoln <  0).  If the solute-solvent interaction is weaker than the solvent-solvent and solute-solute  interactions, then the solution process is endothermic (ΔHsoln > 0).  

In the dissolution of sodium chloride, this process is exothermic.

3 0
3 years ago
What does a circle filled in with a dark color represent in a pedigree chart?
Alina [70]

A circle or square that is not shaded indicates that a person neither expresses the trait nor is a carrier of the trait. within a family, is used. In a pedigree, a circle represents a female, and a square represents a male. A filled-in circle or square shows that the individual has the trait being studied.

7 0
3 years ago
Can chopper be changed to gold? Explain​
Firlakuza [10]

Answer:

A team of Chinese researchers have turned cheap copper into a new material “almost identical” to gold, according to a study published in peer-reviewed journal Science Advances on Saturday. The fast-moving ionized particles blasted copper atoms off the target.

hope this helps

have a good day :)

Explanation:

7 0
2 years ago
Number of moles of sodium azide<br>​
Basile [38]

Answer:

0.015382279644614 mole.

3 0
2 years ago
Read 2 more answers
Unknown # 41
Semmy [17]
Answer: Potassium Iodide, KI

Explanation:

Flame test colors:

Li+ = Crimson Red
Na+ = Bright Orange-Yellow
K+ = Lilac

Addition of nitric acid and silver nitrate (HNO3 and AgNO3),

Cl- = White precipitate
Br- = Creamy precipitate
I- = Yellow Precipitate

Hope this helps, brainliest would be appreciated :)
3 0
2 years ago
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