Answer:
C. ribosomes
Explanation:
Both prokaryotic and eukaryotic cells contain certain structures called ORGANELLES. They possess some in common and others are not found in one or the other. According to this question, a small, free-floating organelle made from nucleic acid and amino acid is found in both eukaryotes and prokaryotes. This organelle is RIBOSOMES.
Ribosomes are organelles responsible for the synthesis of protein in both eukaryotes and prokaryotes. They can be found free-floating or attached to endoplasmic reticulum. Ribosomes are predominantly made of RNA (nucleic acid) and proteins i.e. Ribosomal RNA (rRNA) and proteins is their structural constituent. Hence, the organelle in this question is RIBOSOME.
If it is assumed that there are only two isotopes then the percent abundance needs to add up to 100%
100-35= 65%
The second isotope will have a 65% abundance.
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Answer:
![\large \boxed{\math{\dfrac{\text{6 mol thiosulfate}}{\text{1 mol iodate}}}}](https://tex.z-dn.net/?f=%5Clarge%20%5Cboxed%7B%5Cmath%7B%5Cdfrac%7B%5Ctext%7B6%20mol%20thiosulfate%7D%7D%7B%5Ctext%7B1%20mol%20iodate%7D%7D%7D%7D)
Explanation:
The I₂ is the common substance in the two equations.
(1) IO₃⁻ + 5I⁻ + 6H⁺ ⟶ 3I₂ + 3H₂O
{2) I₂ + 2S₂O₃²⁻ ⟶ 2I⁻ + S₄O₆²⁻
From Equation (1), the molar ratio of iodate to iodine is
![\dfrac{\text{I}_{2}}{\text{IO}_{3}^{-}} = \dfrac{3}{1}](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Ctext%7BI%7D_%7B2%7D%7D%7B%5Ctext%7BIO%7D_%7B3%7D%5E%7B-%7D%7D%20%3D%20%5Cdfrac%7B3%7D%7B1%7D)
From Equation (2), the molar ratio of iodine to thiosulfate is
![\dfrac{\text{S$_{2}$O}_{3}^{2-}}{\text{I}_{2}} = \dfrac{2}{1}](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Ctext%7BS%24_%7B2%7D%24O%7D_%7B3%7D%5E%7B2-%7D%7D%7B%5Ctext%7BI%7D_%7B2%7D%7D%20%3D%20%5Cdfrac%7B2%7D%7B1%7D)
Combining the two ratios, we get
![\text{Stoichiometric factor} = \dfrac{\text{S$_{2}$O}_{3}^{2-}}{\text{IO}_{3}^{-}} = \dfrac{\text{S$_{2}$O}_{3}^{2-}}{\text{I}_{2}} \times \dfrac{\text{I}_{2}}{\text{IO}_{3}^{-}} = \dfrac{2}{1} \times \dfrac{3}{1} = \mathbf{\dfrac{6}{1}}\\\\\text{The stoichiometric factor is $\large \boxed{\mathbf{\dfrac{\text{6 mol thiosulfate}}{\text{1 mol iodate}}}}$}](https://tex.z-dn.net/?f=%5Ctext%7BStoichiometric%20factor%7D%20%3D%20%5Cdfrac%7B%5Ctext%7BS%24_%7B2%7D%24O%7D_%7B3%7D%5E%7B2-%7D%7D%7B%5Ctext%7BIO%7D_%7B3%7D%5E%7B-%7D%7D%20%3D%20%5Cdfrac%7B%5Ctext%7BS%24_%7B2%7D%24O%7D_%7B3%7D%5E%7B2-%7D%7D%7B%5Ctext%7BI%7D_%7B2%7D%7D%20%5Ctimes%20%5Cdfrac%7B%5Ctext%7BI%7D_%7B2%7D%7D%7B%5Ctext%7BIO%7D_%7B3%7D%5E%7B-%7D%7D%20%3D%20%5Cdfrac%7B2%7D%7B1%7D%20%5Ctimes%20%5Cdfrac%7B3%7D%7B1%7D%20%3D%20%5Cmathbf%7B%5Cdfrac%7B6%7D%7B1%7D%7D%5C%5C%5C%5C%5Ctext%7BThe%20stoichiometric%20factor%20is%20%24%5Clarge%20%5Cboxed%7B%5Cmathbf%7B%5Cdfrac%7B%5Ctext%7B6%20mol%20thiosulfate%7D%7D%7B%5Ctext%7B1%20mol%20iodate%7D%7D%7D%7D%24%7D)
Answer:
1.44 x 10²⁵ ions of Na⁺
Explanation:
Given parameters:
Mass of NaCl = 1.4kg = 1400g
Unknown:
Number of ions of sodium = ?
Solution:
The compound NaCl in ionic form can be written as;
NaCl → Na⁺ + Cl⁻
In 1 mole of NaCl we have 1 mole of sodium ions
Now, let us find the number of moles in NaCl;
Number of moles =
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Number of moles =
= 23.93mol
So;
Since 1 mole of NaCl gives 1 mole of Na⁺
In 23.93 mole of NaCl will give 23.93 mole of Na⁺
1 mole of a substance = 6.02 x 10²³ ions of a substance
23.93 mole of a substance = 6.02 x 10²³ x 23.93
= 1.44 x 10²⁵ ions of Na⁺