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Sliva [168]
3 years ago
9

A teacher makes the following statement.

Chemistry
2 answers:
Sergeu [11.5K]3 years ago
8 0
The teacher is mostly talking about Gasoline
Ann [662]3 years ago
7 0

The teacher is talking about evaporation of a mixture. You can tell because she mentions that each part of gasoline, a mixture, has a different melting point.

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van der Waals bonding can be important to the modulus of which of the following? Select one: a. metals only b. some polymers c.
julsineya [31]

Answer:

Hydrogen bonded materials

Explanation:

Metals have metallic bonds, polymers usually have covalent bonds and ceramic materials have covalent and ionic bonds; on the other hand, hydrogen bonds are a type of bonding characterized for have Van der Waals interactions, a type of intermolecular interactions, so the correct answer is Van der Waals interactions.

5 0
2 years ago
If 0.0262 mol of cacl2 is dissolved in water to make a 0.520 m solution, what is the volume of the solution?
Oduvanchick [21]
Cacl2  dissolve   in  water   according  to the  following  equation

Cacl2 + H2O  =  Ca(OH) + Hcl
Volume=  moles/molarity
  The  reacting  ratio    between CaCl2  to  Ca(OH)  is   1:1
therefore  moles  of  solution   is  also  0.0262  moles hence  volume   is  =
0.0262mol/  0.52mol/l =  0.0504L  or50.4ml
5 0
3 years ago
What is the mass number of an iron atom that has 29 neutrons?
hjlf

Answer:

The answer is 54

Explanation:

8 0
2 years ago
How could natural selection lead to speciation?
Harlamova29_29 [7]

Answer:

Speciation can be driven by evolution, which is a process that results in the accumulation of many small genetic changes called mutations in a population over a long period of time. ... Natural selection can result in organisms that are more likely to survive and reproduce and may eventually lead to speciation.

I hope it's helpful!

6 0
2 years ago
Why do electrons enter the 4s orbital before entering the 3D orbital
garri49 [273]

The 3d sublevel is not filled until after the 4s sublevel, because the 3d sublevel has more energy than the 4s sublevel, and less energy than the 4p sublevel. (:

8 0
3 years ago
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