Calculate the t90 (shelf-life) for your unknown at 70 °C assuming the activation energy, Ea, for the process is 105 kJ/mol. Show all work. Symbolically state the equations you are using defining all variables and constants. (Hint, the material in U5 M3 under "Temperature Effects" may prove useful).Given:R = 0.008314K1 = 5 E-08T1 = 70 °C = 273.16 KT2 = 24 °C = 297.15 KEa = 73 kJ/mol

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.

Give the orbital configuration of the phosphorus (p) atom.

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?