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.
I pretty sure the answer is true but here is also a site to help you. https://www.britannica.com/science/wave-water
I'm pretty sure its the first one
Explanation:
I think its CuCO3+NaNO3 but idk if its right
it is because it reacts readily with other compounds
