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ankoles [38]
3 years ago
5

Which choice has prokaryotic cells?

Chemistry
1 answer:
creativ13 [48]3 years ago
8 0
The answer is E. coli
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g Which ONE of the following pure substances will exhibit hydrogen bonding? A) methyl fluoride, FCH3 B) dimethyl ether, CH3C–O–C
luda_lava [24]

Answer:

C) formaldehyde, H2C=O.

Explanation:

Hello,

In this case, given that the hydrogen bondings are known as partial intermolecular interactions between a lone pair on an electron rich donor atom, particularly oxygen, and the antibonding molecular orbital of a bond between hydrogen and a more electronegative atom or group. Thus, among the options, C) formaldehyde, H2C=O, will exhibit hydrogen bonding since the lone pair of electrons of the oxygen at the carbonyl group, are able to interact with hydrogen (in the form of water).

Best regards.

8 0
3 years ago
How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr3+Cr3+ using a current of 55.2 amps in
Kamila [148]

Answer : The time it take to plate out will be, 3.69 minutes.

Explanation :

First we have to calculate the moles of Cr.

\text{Moles of }Cr}=\frac{\text{Mass of Cr}}{\text{Molar mass of Cr}}

Molar mass of Cr = 51.9 g/mol

\text{Moles of }Cr}=\frac{2.19g}{51.9g/mol}=0.0423mol

The cathode half-reaction is,

Cr^{3+}+3e^-\rightarrow Cr

From this we conclude that,

The number of electrons (n)  in the reaction are 3.

The quantity of charge required for the reduction of 1 mole of Cr^{3+} = 3\times F

The quantity of charge required for the reduction of 0.0423 mole of Cr^{3+} = 0.0423\times 3\times F=0.1269F=0.1269\times 96500C=12245.85C

Now we have to calculate the time taken.

We know that,

q=I\times t

t=\frac{q}{I}=\frac{12245.85C}{55.2A}=221.845s=3.69min

Thus, the time it take to plate out will be, 3.69 minutes.

7 0
3 years ago
Assume that a 100-base pair DNA double helix contains 45 cytosine bases. Use logical thinking to figure out how many adenine bas
shepuryov [24]

Answer:

You will not be allowed to have any learning aids while taking a test or ... A DNA molecule consists of three parts—a nitrogen base, ... There are four DNA nucleotides, each with one of the four nitrogen bases (adenine, thymine, cytosine, and guanine). The DNA forms a two-stranded spiral, or double helix.

Explanation:

hope this helps ✌️

7 0
4 years ago
Can someone help me on this please
ioda
Should be 27300 milligrams
4 0
3 years ago
Read 2 more answers
What is electrical conductivity? Make it simple
Alenkasestr [34]

Answer: Explanation:

Conductivity of an electrolyte solution is a measure of its ability to conduct electricity. The SI unit of conductivity is Siemens per meter.

3 0
4 years ago
Read 2 more answers
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