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Vsevolod [243]
2 years ago
13

The group of molecules called nucleotides contain:

Chemistry
1 answer:
Grace [21]2 years ago
8 0
The group of molecules called nucleotides contain  phosphate groups, pyrimidines, purines, and <span>pentose (a 5-carbon sugar). Therefore, E. all of the above is the correct answer.</span> 
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Mr. Rutherford's chemistry class was collecting data in a neutralization study. Each group had 24 test tubes to check each day f
ycow [4]
I’m pretty sure it is A at least that’s what we did at our school to test this
6 0
2 years ago
4. a student is shown a Diagram which shows gas bubbles being made by water plant that has been exposed to light. which gas is m
lisov135 [29]
Carbon dioxide is in the bubbles
5 0
2 years ago
Acetaldehyde shows two UV bands, one with a lmax of 289 nm ( 5 12) and one with a lmax of 182 nm ( 5 10,000). Which is the n p*
UkoKoshka [18]

Answer:

The bands are due to:

λmax = 289 nm n→π* transition (E = 12)

λmax = 182 nm π→π* transition (E=10000)

Explanation:

The two types of acetaldehyde transition are as follows:

n→π* and π→π*

From the attached diagram we have to:

ΔEn→π* < ΔEπ→π*

ΔEα(1/λ)

Thus:

λn→π* > λπ→π*

In n→π* spin forbidden, the intensity is low. Thus, the molar extinction E for n→π* is very low.

The same way, for π→π* spin allowed the intensity is high. Thus, the molar extinction coefficient E for π→π* is high too.

The bands are due to:

λmax = 289 nm n→π* transition (E = 12)

λmax = 182 nm π→π* transition (E=10000)

5 0
2 years ago
2. If a machine produces 225 parts in an 8 hour day, how many minutes will it take to
vekshin1

21.28s

Explanation:

This is a rate problem.

Number of parts produced = 225

 Time taken to produce= 8hours

Rate of production is the amount of parts produced in a duration of time.

  Now convert  8 hours to minute;

   60 minutes = 1hr

    8 hours  = 60 x 8 = 480minutes

Now:

Rate of production = \frac{225 parts}{480min} = 0.47parts/minute

  Now, to produce 10 parts;

   It takes;

                 0.47 parts to be produced in 1 minute

                 10 parts would be produced in \frac{10}{047} = 21.28s

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4 0
2 years ago
Zinc sulfide reacts with oxygen according to the reaction 2ZnS(s)+3O2(g)→2ZnO(s)+2SO2(g) A reaction mixture initially contains 5
LenKa [72]

Answer:

The answer to your question is: Excess oxygen = 2.3 mol

Explanation:

Data

ZnS = 5 mol

O2 = 9.8 mol

Excess reactant = ?

Balanced reaction

                                 2ZnS(s) + 3O2(g) → 2ZnO(s) + 2SO2(g)

MW ZnS = 65 + 32 = 97 x 2 = 194 g

MW O2 = 16 x  6 = 96 g

                           2 mol of ZnS  ------------------- 3 mol O2

 

Ratio from the reaction = 3 mol O2/ 2 mol ZnS

                                      = 1.5

Ratio from the quantities in the experiment = 9.8 mol O2 / 5 mol of ZnS

                                                                        = 1.96

Excess reactant = Oxygen because the ratio increases

                             

                                2 mol of ZnS  ------------------- 3 mol O2

                                5 mol of ZnS  -------------------  x

                                x = (5 x 3) / 2

                               x = 7.5 mol of O2

Excess Oxygen = 9.8 mol - 7.5 mol

Excess oxygen = 2.3 mol

4 0
2 years ago
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