Calculate the pH after 0.020 mol HCl is added to 1.00 L of each of the four solutions below. Answer with the correct number of significant figures. (a) 0.122 M HONH2 (Kb = 1.1 ✕ 10-8)
(b) 0.122 M HONH3Cl
(c) pure H2O
(d) a mixture containing 0.122 M HONH2 and 0.122 M HONH3Cl

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.