The dynamic critical radius of nuclei in homogeneous nucleation () can be defined as . Consider an ice crystal nucleus of 1.23 nm radius. The melting temperature of water is 273 K, the surface tension between ice and water is 10-19J/nm2 and the enthalpy of melting is 4*10-19 J/nm3. How much undercooling (in Kelvin) is required so that water can solidify via homogeneous nucleation

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

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

the answer is true. hope it .