Answer:
<h2>9.93 × 10²³ atoms</h2>
Explanation:
The number of atoms of potassium can be found by using the formula
<h3>N = n × L</h3>
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 1.65 × 6.02 × 10²³
We have the final answer as
<h3>9.93 × 10²³ atoms</h3>
Hope this helps you
Answer:
A simple solution is prepared by dissolving a solute species of known mass into a liquid solvent of known volume. In the prepared solution there is a certain total number of solute moles dissolved in a certain total solution volume in liters. known as Molarity.
This is an aqueous solution where ammonium sulfate is the solute. It is a salt compound that fully dissociates to provide twice the ammonium cation molarity:
(NH₄)₂SO4(s) → 2NH₄⁺ (aq) + SO2₄⁻(aq)
From the required ammonium cation molarity, the required compound molarity will be:
[NH₄⁺]=0.150M
[(NH₄)₂SO₄]= 0.150 M÷2=0.0750M
We multiply this molarity by the given solution volume to get the ammonium sulfate moles required:
N compound = 0.25000L×0.0750 M
=0.0188 mol
We multiply these moles by the known ammonium sulfate molar mass to get the mass in grams:
M compound= 0.0188 mol×132.14gmol
=2.48g
Learn more about Molarity here-
brainly.com/question/8732513
#SPJ4
I think it is A. The reaction rates can change.
I think we all know that B. and C. are incorrect, but I took a science lesson about this and it specifically said that on a graph of a rate, a curved line is NOT constant, meaning it is possible to not be constant.