calculate the theoretical weight (mass) of the product hydrobenzoin if 50.00 mg of benzil is reduced by 10.50 mg of nabh4. keep 2 digits after the decimal point .
benzil -> (nabh4) -> hydrobenzoin
physical constants
mw. mp
benzil 210.22. 94-95
hydrobenzoin ( s, s or r, r) 214.27. 148.5-149.5
hydrobenzoin. (meso). same. 137-139
hydrobenzoin. (racemic). same. 122-123
sodium borohydride 37.83. 400 d

What type of matter is made of only one kind of atom

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.

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg