A glass of cold water whose particles had a low average kinetic energy was placed on a warm table. The average kinetic energy in the cold water increased while the average kinetic energy of the part of the table under the glass decreased. What do you think happened?

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.