Which is true of weak acids and bases?

they partially dissociate in water

they dissociate completely in water

they are unable to react with water

they lose all their properties when in water

They partially dissociate in water

Explanation: Weak acids are those substances which dissociate partially to give ions when dissolved in water.

Weak bases are those substances which dissociate partially to give ions when dissolved in water.

Strong acids are those substances which dissociate completely to give ions when dissolved in water.

Strong bases are those substances which dissociate completely to give ions when dissolved in water.

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