You have 100ml of 1M Glycine (total Glycine) and you want to make a buffer at pH = 3.2. Assuming normal pKa values for amino acids, which functional group would be relevant for this buffer, and how much Glycine in the unprotonated versus protonated state would you need? (HINT: what is the ratio of unprotonated versus protonated at pH = 3.2?)
a. Amine, 9mM B / 91mM BH+b. Amine, 91 mM B / 9mM BH+c. Acid, 9mM A- / 91mM HAd. Acid, 91mM A- / 9mM HA

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.