Answer:
1 is the same 3 is pure substance 4 is different
Explanation:
not sure about 2
M₁V₁ = M₂V₂
(0.050M)*(10 mL) = (0.10M)*(x)
x = 5 mL
You would take 5 mL of the 0.10 M solution of HCl and add 5 mL of deionized water. Therefore, the total volume will be 10 mL and it will have a molarity of 0.050.
The formula that represent a covalent compound would be H2O2
