Methane gas, CH4, effuses through a barrier at a rate of 0.487 mL/minute. If an unknown gas effuses through the same barrier at a rate of 0.294 mL/minute, what is the molar mass of the gas

Matches the chemical name of each oxide of phosphorus to its chemical formula

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

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.