Law of mass conservation states that.....whatever happens mass of products and reactants are always equal ! so we can balance by putting this thing in mind !!!
final answer: 0.60373134328 g.
Mg 0.809 g.
----- = ------------ = 0.60 g
MgO 1.34 g.
1 kg/L -------------- 0.001 kg/mL
22.4 kg/L --------- ??
22.4 x 0.001 / 1 => 0.0224 kg/mL
The answer is A),<span>carbon,hydrogen,and oxygen
Hope this helps
</span>
Answer:
0.698 M.
Explanation:
Let's remember the concept of molarity: The molarity (M) of a solution is the number of moles of solute dissolved in one liter of solution. To calculate the molarity of a solution, divide the moles of solute by the volume of the solution expressed in liters, like this:
To find the moles of solute (KCl, in this case) we have to convert 14.6 g of KCl to moles using its molar mass which is 74.5 g/mol, like this:
Now, let's convert 281 mL to L. Remember that 1 L equals 1000 mL:
The final step is to replace the data that we obtained in the molarity formula:
The answer would be that the molarity of the solution is 0.698 M.