3. Given the following heats of formation. Calculate the heat of combustion of each compound in kJ mole-1. The product in each case
will be CO2 and H20.

(a) ethane, C2H -107 kJ mole
(b) acetylene, C2H2, +227 kJ mole
(c) benzoic acid, C7H6O -390 kJ mole​

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.