Consider the following data on some weak acids and weak bases: Acid Ka
name formula
nitrous acidHNO2×4.510−4
acetic acidHCH3CO2×1.810−5
Base Kb
name formula
ammonia NH3 ×1.810−5
ethylamineC2H5NH2×6.410−4
Use this data to rank the following solutions in order of increasing pH
solution pH
0.1 M NaNO2
0.1 M NH4Cl
0.1 M NaI
0.1 M C2H5NH3Br

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

your answer would be “dry”

have a great day because if you dont you and i will be sad