Answer:
0.0295M
Explanation:
As you can see, in the mixture you have KSCN and other compounds. The KSCN in solution is dissolved in K⁺ ions and SCN⁻ ions. That means initial concentration of SCN⁻ ions is the same of KSCN, 0.0800M.
You are adding 35.0mL of this solution and the total volume of the mixture is 20.0mL + 35.0mL + 40.0mL = 95.0mL.
That means you are diluting your solution 95.0mL / 35.0mL = 2.714 times.
And the concentration of SCN⁻ is:
0.0800M / 2.714 =
<h3>0.0295M </h3>
Answer:
Z=22.70
Explanation:
It is given that,
An element Z that has two naturally occurring isotopes with the following percent abundances as follows :
The isotope with a mass number 22 is 65.0% abundant; the isotope with a mass number 24 is 35.0% abundant.
The average atomic mass for element Z is given by :
So, the average atomic mass for element Z is 22.70.
Poler covalent
again don’t quote me on it i’m just trying my best with what i remember
Answer:
Graphite is black and shiny but soft. The nano-forms, fullerenes and graphene, appear as black or dark brown, soot-like powders. Carbon is unique among the elements in its ability to form strongly bonded chains, sealed off by hydrogen atoms.
Explanation:
The sphere is probably made of silver.
<em>V</em> = ⁴/₃π<em>r</em>^3 = ⁴/₃π(0.40 cm)^3 = 0.268 cm^3
<em>D</em> = <em>m</em>/<em>V</em> = 2.813 g/0.268 cm^3 = 10.5 g/cm^3
The density of silver is 10.5 g/cm^3.
