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Nimfa-mama [501]
3 years ago
8

Which is a diatomic molecule? A)He B)O2 C) NaCl D)CuF2

Chemistry
2 answers:
julsineya [31]3 years ago
8 0
The answer for this is B) O2
katrin2010 [14]3 years ago
3 0

Answer:

B. O2

Explanation:

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the half life for strontium-90 is 29 years. how many half-lives did the sample go through at the end of 87 year​
Nesterboy [21]
90 divided by 29 x 87 = 290
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2 years ago
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2-butanone is converted into 3-methyl-3-hexanol using a grignard reagent prepared from 1-bromopropane and magnesium metal in thf
Andre45 [30]

Answer:

Here's what I get.

Explanation:

At the end of the reaction you will have a solution of the alcohol in THF.

The microdistillation procedure will vary, depending on the specific apparatus you are using, but here is a typical procedure.

  • Transfer the solution to a conical vial.
  • Add a boiling stone.
  • Attach a Hickman head (shown below) and condenser.
  • Place the assembly in in the appropriate hole of an aluminium block on top of a hotplate stirrer.
  • Begin stirring and heating at a low level so the THF (bp 63 °C) can distill slowly.
  • Use a Pasteur pipet to withdraw the THF as needed.
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7 0
3 years ago
5 A Punnett square is shown below. The domin
arsen [322]
The answer is 25 percent
7 0
3 years ago
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Consider the reaction CaCO3(s) --> CaO(s) + CO2(g)
tankabanditka [31]

Answer:

Kc = [CO2], that is to say it is equal to the concentration of CO2

Explanation:

It is a heterogeneous equilibrium since the substances that participate in the reaction are in different phases

In the heterogeneous limestone decomposition reaction:

CaCO3(s) --> CaO(s) + CO2(g)

The equilibrium constants are:

Kc = [CO2(g)]; Kp = PCO2(g); Kc = Kp (R T)^ −(1−0) = Kp (R T)^ −1

The equilibrium situation is not affected by the amount of  solid or liquid, as long as these substances are present.

The equilibrium constant is independent of the  amounts of solids and liquids in equilibrium.

4 0
3 years ago
How do you know the difference between a compound and mixture?
lorasvet [3.4K]

Answer:

A compound can only be seperated through chemical means while a mixture are formed when two substances are added together without chemical bonds being formed.

Explanation:

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3 years ago
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