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3 years ago

33p is a radioactive isotope of phosphorus. can 33p be used to make a radioactive nucleotide?

Chemistry

2 answers:

Lunna [17]3 years ago

8 0

Yes, because it can replace the phosphorus atom in the phosphate group. Apex.

Agata [3.3K]3 years ago

5 0

Answer:

Yes, we can use 33p used in making radioactive nucleotide because phosphorus changes into phosphate group.

Explanation:

Phosphorus is the artificial radioactive element, mainly isotopes of Uranium and Polonium are used in making radioactive elements. 33p(Half life of 25.34 days) and 32p(Half life of 14.263 days) are the radioactive type of phosphorus.

Therefore, we can use 33p used in making radioactive nucleotide because phosphorus changes into phosphate group.

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The concentration of a biomolecule inside a rod‑shaped prokaryotic cell is 0.0035 M . Calculate the number of molecules inside t

timama [110]

Answer: This rod-shape prokaryotic cell has 3.740,734725‬ molecules

Explanation:

Step 1 : given data

Molarity of the prokaryotic cell = 0.0035 M

Length of the cell = 4.2 μm = 4.2 * 10^-6 m

diameter of the cell = 1.3 μm = 1.3 * 10^-6 m

Step 2: calculate volume

To calculate volume of a rod, weneef to know the radius.

V = r ² × l

The radius = half of the diameter : r = d/2 ⇒ (1.3 * 10^-6 m)/2 = 0.65 * 10^-6 m

V= (0.65 * 10^-6 m)² * 4.2 * 10^-6 m = 1.7745 * 10 ^-18 L

Step 3: Calculating number of moles

Number of moles = Concentration * Volume

moles = 0.0035 M * 1.7745 * 10 ^-18 L = 6.21075 * 10^-21 moles‬

Step 4: calculating number of molecules

1 mole contains 6.023 * 10 ^-23 molecules

6.21075 * 10^-21 moles contain : 6.21075 * 10^-21 * 6.023 * 10 ^-23 molecules = 3.740,734725‬ molecules

This rod-shape prokaryotic cell has 3.740,734725‬ molecules

4 0

3 years ago

What is the oxidation number of chlorine in HClO4?

Elza [17]

CIO4-=-1

CI=4O=-1

O has a 2- oxidation change so

CI+4(-2)=-1

CI+(-8)=-1

CI=-1+8=7

So the oxidation number of chlorine is 7 in this case

8 0

3 years ago

What element has 81 protons in the nuclei of its atoms?

WITCHER [35]

Thallium has got 81 protons

Have a nice days.......

7 0

2 years ago

Read 2 more answers

All organisms have the same number of cells A. true B. false

MakcuM [25]

B. false is the answer of this question

4 0

3 years ago

Read 2 more answers

Electronegativity is a measure of an atom’s affinity for electrons. Which of the following statements is true? Electronegativity

jekas [21]

Answer: Electronegativity increases as the size of an atom decrease.

Explanation: Electronegativity is the measure of the ability of an atom in a bond to attract electrons to itself.

Electronegativity increases across a period and decreases down a group.

Towards the left of the table, valence shells are less than half full, so these atoms (metals) tend

to lose electrons and have low electronegativity. Towards the right of the table, valence shells are more than half full, so these atoms (nonmetals) tend to gain electrons and have high electronegativity.

Down a group, the number of energy levels (n) increases, and so does the distance between the nucleus and the outermost orbital. The increased distance and the increased shielding weaken the nuclear attraction, and so an atom can’t attract electrons as strongly.

4 0

3 years ago