1) how much tris (MW 121 g/mol) do you need to make 100 mL of a 20 mM buffer?

2) how much NaCl do you need to make 100 mL of a 5mM solution?

3) how much imidazole do you need to make 100 mL of a 5 mM solution?

4) how much glycerol do you need to make 100 mL of a 10% solution?

5) how much imidazole do you need to make 100 mL of a 20 mM solution?

6) how much tris do you need to make 50 mL of a 20 mM buffer?

7) how much imidazole do you need to make 50 mL of a 250 mM solution?