A sample of liquid chocolate in a bowl is cooled in the refrigerator at a constant rate. Based on the graph, what is the melting freezing point of the chocolate? 28.5°C

23.5°C

25.5°C

Not enough information is given.

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

What are transitions between a liquid and a solid called? identify which way they are transitioning

Why do cells appear different in distilled water than they do in 10% salt water?