Carbon-12 and carbon-13 are isotopes of carbon. which of the following statements is correct? they both have seven protons in the nucleus. they both have the same mass number. they both have seven neutrons in the nucleus. they both have the same atomic number.

Identify a strong intermolecular force of attraction between an alcohol

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.

Identify the lewis acid in this balanced equation: ag+ + 2nh3 -> ag(nh3)2+a. ag+b. nh3c. ag(nh3)2+