Determine the pH change when 0.062 mol HBr is added to 1.00 L of a buffer solution that is 0.485 M in HCN and 0.264 M in CN". pH after addition - pH before addition = pH change =

*tilts head* sounds more like a statement

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

h

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.