A is the answer I know bc I take biology
There are a number of
ways to express concentration of a solution. This includes molarity. Molarity
is expressed as the number of moles of solute per volume of the solution. The
concentration of the solution is calculated as follows:
<span> </span><span>Molarity = 15.5 g NaOH (1 mol NaOH / 40 g NaOH) / .250 L
solution</span>
<span>Molarity = 1.55 M</span>
40.0 is the answer, sorry, I had some lag, I would've answered it like 5 minutes ago
Hope I helped
The first one will be 2 1 -> 2 1
Second is 2 3 -> 6 1
