The answer is
1.77 * 10-6 M.
Solution:
.7 ug * (1 g \ 106 ug) This converts our value from micrograms (ug) to grams (g).
* (1 mole Selenium \ 78.96 g Selenium) This gives out our # of moles Selenium by using Selenium's molar mass (78.96 g/mol).
= 8.87 * 10-9 moles Selenium
Divided by the volume in liters (.005 L)
= 1.77 * 10-6 moles Selenium \ 1 L (M)
Check:
.005 L * (1.77 * 10-6 moles Selenium\ 1 L)
= .00000177 moles Selenium
* (78.96 g Selenium \ 1 mole Selenium)
* (106 ug \ 1 g)
~= .7 ug.
- Mike
The molarity is o,2.
The molarity is 0,125 M.
4.32
Molarity means moles in a litre. Therefore you need to divide by 3.95. 1.4/3.95 is 0.35443 molar.
Molarity = moles of solute/Liters of solution Molarity = 5 moles solute/4.5 Liters of solution = 1 M solution ==========
The molarity is 2,973.
The molarity of KF solution containing 116 g of KF in 1.00 L is 2.00 moles.
The molarity is o,2.
The molarity of a solution containing 7.0 moles of solute in 569mL of solution is a)81M b)0.081M c)12M D)4.0M The answer is C. 12M 7 x 1000/569 = 12.302
The molarity is 0,125 M.
4
4.32
molarity = moles/litre [solution] = 12 mol/6 L [solution] = 2 mol/L = 2 M
8.2mol/dm3
5.0
1M
0.909 or 0.91