Based on the graph, it can be concluded that the isotope which is most likely to be found with 6.25% of its original amount in 16 billion years? A. Rubidium-87
B. Uranium-238
C. Potassium-40
D. Thorium-235

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?

The melting point of sulfur is 115 °c and its boiling point is 445 °c. what state would sulfur be in at 200 °c?

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .