Some very hot rocks have a temperature of 190 ^o C and a . . . - Socratic Some very hot rocks have a temperature of #190 ^o C# and a specific heat of #90 J (Kg*K)# The rocks are bathed in #270 L# of boiling water If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks? PhysicsHeatLatent Heat
Question #e395e - Socratic When decaying by alpha emission a nucleus drops by 4 in mass number and 2 in atomic number and emits a helium nucleus (alpha particle) which has mass number 4 and atomic number 2 194 81 T l → 190 79 Au + 4 2α Notice that the total mass number, and total charge (here only indicated by the atomic numbers ) remains unchanged, just moved around If the question meant another isotope, just
Question #9c6af - Socratic "3 2 mol kg"^(-1) In order to be able to calculate the molality of the solution, you need to know the number of moles of solute present for every "1 kg" = 10^3 "g" of solvent In your case, you know that this solution is "16% m m" urea, which implies that you get "16 g" of urea, the solute, for every "100 g" of solution If you take a "100-g" sample of this solution, you can say that it
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