weighing emty as buret

Can somone guide me with these questions?:

1) You weigh an empty gas buret, fill it to the 50.00 mL mark with distilled water and weigh it again.
Experimental Data

Mass of empty gas buret 42.23 g
Mass of gas buret filled to 50 mL mark with water 95.50 g
Temperature of the water 22.1 °C
Density of water... @ 20.0 °C 0.9982 g/cc; D35 °C=0.9941 g/cc
Specific Gravity of Mercury... 13.55

Calculate:

a) Density of water at 22.1 °C (by interpolation) ______________ g/cc
b) Volume of water filling buret to 50.00 mL mark ______________ mL
c) Extra volume of water in addition to the 50.00 mL ______________ mL

2) You are asked to make 191 mL of 1.466 M HCl starting with 6.0 M HCl.

d) The volume of 6.0 M HCl needed is (to 0.1 mL) ______________ mL

3) You standardize the "1.466 M" HCl by pipetting a known amount of it into a flask and titrating to the phenolphthalein endpoint with an NaOH solution of known concentration
Experimental Data:

Volume of "1.466 M" HCl used 4.22 mL
Concentration of NaOH used 0.1943 M
Initial buret reading 0.09 mL
Buret Reading at endpoint 32.26 mL

Calculate:

e) Exact molarity of your HCl ______________ M

4) You pipet a known amount of this standardized HCl into a 15 cm sample tube and float a "boat" containing your unknown.
You hook up the sample tube and contents to the gas buret.
You shake the tube to start the reaction.
When the metal unknown is completely dissolved, you read the gas buret and measure the height of the buret's meniscus above the water level.
Experimental data:

Volume of standardized HCl used 4.18 mL
Weight of metal unknown used 70.4 mg
Gas buret reading after reaction is compete 33.40 mL
Height of meniscus above water level 12.5 cm
Atmospheric pressure 751.9 mmHg
Temperature of the water 30.2 °C

Calculate:

f) Vapor pressure of water at 30.2 °C
interpolate data at... ______________ mmHg
g) Total volume of gas released ______________ mL
h) Partial pressure of hydrogen ______________ mmHg
i) Equivalent weight of metal
based on amount of hydrogen generated ______________ g/eq

5) The remaining solution in the 15 cm sample tube containing the reaction products and the unused HCl is quantitatively transfered to a flask and titrated to its endpoint with the standard NaOH.
Experimental data:

Initial volume of buret 0.12 mL
Final volume of buret 16.16 mL

Calculate:

j) Equivalent weight based on the amount of acid used up ______________