The source of alpha particles in a smoke detector is the

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

In 2002, the rare earth elements mine in mountain pass, california was closed because

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m