Imagine there are heavy rainfalls for days. the river near the area starts to overflow. erosion starts to take place. explain what happens

Erosion is the wearing away of rock and soil found along the river bed and the river banks. Erosion also involves the breaking down of the rock particles that get carried downstream by the river.  the rocks start to wear off and break down slowly.

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

6.4 cm (max) - 25 cm (min)