What is the mass of 19.5 moles of carbon dioxide?

Explanation:

mass = moles * molar mass

molar mass of carbon dioxide (CO2) = 12+32 = 44

= 19.5* 44 = 858

proof

moles = mass /molar mass

= 858/44 = 19.5 moles

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;