Pls help me
this is educake, which of the 3 options is it?

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88