In chemistry, the pH of a substance is a measure of its acidity. The relationship between C, the hydrogen ion concentration in moles per liter, and p, the pH, is described by the equation below. C=10−p
A chemistry student has determined that the hydrogen ion concentration of vinegar is 0.00631 moles per liter. Which is closest to the pH of vinegar?

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.