Hello wonderful people and Good morning, or afternoon My friend, Jacub Womack, is looking for a Girl friend. Is there any single girls who would like him?

He's 13, born September 7, 2007. He's 5'6 in 7th grade. He likes Baseball and Football, He's tall and skinny and has black hair and brown eyes. He lives in Pennsylvania, and hes sweet and kind! sooo any girls want him?

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.