if you mean 710 ml then M = moles/volume = 6.2/0.71 = 8.73 M
620 grams mercury (1 mole Hg/200.6 grams) = 3.09 moles Hg
Copper can form a colored complex with a reagent (such as neocuproine) that absorbs light at 620 nm. By measuring the absorbance of this complex at 620 nm, the concentration of copper in a solution can be calculated based on Beer-Lambert's law.
620
40% of 620= 40% * 620= 0.4 * 620= 248
6% of 620= 6% * 620= 0.06 * 620= 37.2
12% of 620= 12% * 620= 0.12 * 620= 74.4
25% of 620= 25% * 620= 0.25 * 620= 155
The answer is 620
Rounded to the nearest ten it is 620
620
I write 620 billion as 620 billion.
620