Predict whether S for each reaction would be greater than zero, less than zero, or too close to zero to decide. a. H2(g) + F2(g) → 2HF(g)
b. 2SO3(g) → 2SO2(g) + O2(g)

Achef makes salad dressing by mixing oil, vinegar, and spices, as shown. which type of matter is the salad dressing?

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

What must occur for air masses to form fronts