Which equation represents sublimation? 1.
Hg() → Hg(s)
H2O(s) + H2O(g)
2
3.
NH3(g) + NH3(e)
CH4() → CH4(9)
4.

Can someone me with questions 15 to 17 plz.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

What is the binding energy of a nucleus that has a mass defect of 5.81*10-^29 kg a 5.23*10-^12 j b 3.15* 10^12 j c 1.57*10-3 j d 9.44*10^20 j