How can identify hard and soft water

Signs of soft water include: A healthy lather when washing clothes, dishes, and even your hands and body. Clothes that are cleaner, with no mineral stains and less wear-and-tear damage.

Signs of hard water include:

Feeling a film on your hands after washing them,Spots,Mineral stains and Less water pressure in your home.

Explanation:

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally