The mass of one Au atom is 196.97 amu from periodic table and the mass of Avogadro's number of Au atoms is 196.97 g due to this is the mass of one mole of gold
The concentration in mol/L of the chemist's potassium iodide solution : = 4.4 x 10⁻⁴ M
<h3>Further explanation</h3>
Given
88. μmol of Potassium iodide
200. mL volumetric flask
Required
The concentration
Solution
Molarity is a way to express the concentration of the solution
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution
![\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}](https://tex.z-dn.net/?f=%5Clarge%7B%5Cboxed%20%7B%5Cbold%20%7BM%20~%20%3D%20~%20%5Cfrac%20%7Bn%7D%20%7BV%7D%7D%7D)
Conversion :
88. μmol = 88 . 10⁺⁶ mol = 8.8 10⁻⁵ mol
200 ml = 0.2 L
The molarity :
= n : V
= 8.8.10⁻⁵ : 0.2
= 4.4 x 10⁻⁴ M
Answer:
The age of ship is 1900 years.
Explanation:
The half life period of carbon - 14 is 5730 years
Ship have 67 % of the concentration of Carbon-14
And the ship lost (100- 67 = 33%) 33% of carbon - 14.
Therefore,
The age of ship = lost percentage X half life period of carbon -14
![= 33 \times 5730 yrs = 1890.9yrs\equiv 1900\,years](https://tex.z-dn.net/?f=%3D%2033%20%5Ctimes%205730%20yrs%20%3D%201890.9yrs%5Cequiv%201900%5C%2Cyears)
Therefore, The age of ship is 1900 years.
Answer: POH=8
Explanation:PH = -log( H+concentration)
PH = 6
POH = 14 - PH = 8