Evaporation. People have been doing that since ancient times to get salt from sea water.
Controlling temperature by refrigerating and freezing foods also helps to slow down chemical reactions.
Solid indistructible units that are really small really
Answer:
0.313 M NaOH
Explanation:
Remember that Molarity is the concentration of a solution and is represented by:
Let's take your problem into account. The given is the following:
30.0 g of NaOH
2.40 L of solution
Molarity = ?
You are given the solute in grams, so you need to figure out how many moles there are in the given mass of solute. To do this, you need to first solve the molar mass of the solute.
NaOH
Element # of atoms Atomic Mass Total
Na 1 x 22.99 = 22.99
O 1 x 16 = 16.00
H 1 x 1 = <u> 1.00 </u>
39.99 g
So 1 mole of NaOH there is 39.99g of NaOH
We can now use this to convert the 30.00g of of NaOH to moles.
This means that there are 0.75 moles of NaOH in 30.0g of NaOH. We can use this in our molarity equation: