The units for molarity is moles of solute per liter of solution which means if you multiply the molarity of a solution by its volume you get how many moles of solute are in the solution. (0.75Mx0.5L=0.375mol NaCl)
Then you can multiply the moles of sodium chloride (0.375 mol) by its molar mass (58.45 g/mol) to get 21.92g of sodium chloride. That means there is 21.92 grams of sodium chloride in 500mL of 0.75M solution. I hope this helps. Let me know if anything is unclear.
KE=.5mv^2
M=mass
v=velocity
.5(4)(100)=200
That should be the answer.
[Ar] 4s²
Let me know if you want a step by step!
Hope that helps
By circle fraction additional number for the number
