The substituents `R_(1)` and `R_(2)` for nine peptides are listed in the table given below. How many of these peptides are positively charged at `pH=7.0` ?

The substituents R_(1) and R_(2) for nine peptides are listed are listed in the table given below. How many of these peptides are positively charged at pH = 7.0 ? H_(3)overset(o+)(N)-underset(H)underset(|)(C )H-CO-NH-underset(R_(1))underset(|)(C )H-CO-NH-underset(R_(2))underset(|)(C )H-CO-NH-underset(H)underset(|)(C )H-CO overset(Θ)(O)

On how many atoms positive charge is deloclized in the given ion ?

On how many atoms positive charge is deloclized in the given ion ?

How many electrons must be removed from a piece of metal to give it a positive charge of 1.0 xx 10^(-7)C

How many electrons must be removed from a piece of metal to give it a positive charge of 1.0 xx 10^(-7)C

Why 'SnO2' forms a positively charged sol in solutions with 'pH 7'

Two charges q_(1) = 3.0 mu C and q_(2) = - 4.0 mu C initiallly are separated by a distance r_(0) = 2.0 cm . An external agent moves the charges until they are r_(f) = 5.0 cm apart. (i) How much work is done by the electric field in moving the charges from r_(0) to r_(f) ? Is the work positive or negative ? (ii) How much work is donw by the external aganet in moving the charges from r_(0) to r_(f) ? Is the work positive or negative ? (iii) What is the positive energy of the initial state where the charge are r_(0) =2.0 cm apart ? (iv) What is the potential energy of the final state where the charges are r_(f)= 5.0cm apart ? (v) What is the change in potential energy from the initial state to the final state ?