1.
The table below shows standard enthalpy changes of formation:
CO2(g) = -394
NH4NO3(s) = -366
H2O(g) = -242
What is the enthalpy change for the following reaction?
2NH4NO3(s) + C(s) + 2N2 (g) + 4H2O(g) + CO2(9)

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.

What are the first three quantum numbers for the electrons located in subshell 2s?

Define a is a tiny pavket of energy