Which of the following would be a good situation in which to apply hess's law? a. when the reaction is exothermicb. when the products are unknownc. when a reaction is spontaneousd. when the hreaction is not known

What is the empirical formula for c4h8o2

50 points! need answer asap. what type of organic compound contains the following functional group? (2 points)

Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.