Stella has poured 3 cups of water into a 1-l soda bottle. stella then sealed the bottle and placed it in the sunlight. what natural process can stella study with the model she built? a. nitrogen cycle b. rock cycle c. carbon cycle d. water cycle

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

electron microscopy and scanning tunneling microscopes gives us a greater understanding of atoms by being able to see the atom itself, and lets us see some atomic reactions.

explanation:

we need the questions , i may then you.