HELP ME ASAP PLS FOR 12 points If 250 ml of gas is at 350 K, what is its volume if it is changed
to 200 K when pressure is constant? (Don't forget to convert
the mL to L)

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

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 is the value of the standard enthalpy of formation of an element in its most stable form?