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Ulleksa [173]
4 years ago
10

Select all the correct answers.

Chemistry
2 answers:
ankoles [38]4 years ago
4 0

100% that it is 3,4, and 5 because like justin said, the 1st one can't be tested.

larisa86 [58]4 years ago
3 0

<em><u>I believe that the answer are 3, 4, and possibly 5 </u></em>because the 1st question says, ''Where on earth''. It should have been, ''When on Earth''. The others make sense because the scientist or your teacher can test it. Their has to be evidence to support it.

#1 can't be tested because it was in the last decade (which was 10 years ago). Also, it says in #1 that, Where on Earth had a population decrease.

Hope this helps... :)

-Justin0208

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3 years ago
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What is the hybridization of the carbon atoms in 1,3-butadiene, h2c=ch-ch=ch2?
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the 1,3- butadiene is h2c=ch-ch=ch2, so we have 

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4 0
4 years ago
A student dissolves 3.9g of aniline (C6H5NH2) in 200.mL of a solvent with a density of 1.05 g/mL . The student notices that the
Tresset [83]

Answer:

a. Molarity= M =2.1x10^{-1}M

b. Molality= m=2.0x10^{-1}m

Explanation:

Hello,

In this case, given the information about the aniline, whose molar mass is 93g/mol, one could assume the volume of the solution is just 200 mL (0.200 L) as no volume change is observed when mixing, therefore, the molarity results:

M=\frac{n_{solute}}{V_{solution}} =\frac{3.9g*\frac{1mol}{93g} }{0.2L} =2.1x10^{-1}M

Moreover, the molality:

m=\frac{n_{solute}}{m_{solvent}} =\frac{3.9g*\frac{1mol}{93g} }{0.2L*\frac{1.05kg}{1L} } =2.0x10^{-1}m

Best regards.

7 0
3 years ago
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Mrrafil [7]

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Thus, the highest buffer capacity is found in the solution that has the highest concentration of the conjugate acid-base pair, which is 1.25 M HCO₃⁻ / 1.25 M CO₃²⁻ .

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Soloha48 [4]
It’s been awhile but I think it is c
3 0
3 years ago
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