If an air conditioning unit is charged with 5.0 g of R-113 (C2C13F3), how many molecules are being added to the air conditioner? A. 0.20
B. 5.3x10^22
C. 0.027
D. 1.6x10^22
E. 14.5x10^-26
F. 13.0x10^24

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

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.

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule