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Equations for iodometric titration of carbon monoxide

I need to calculate the amount of grams of Na-benzoate in a Na-benzoate buffer (water based) with a pH = 4.2 at 25'C?

How many grams of Na-benzoate (powder) do I need to prepare a buffer with pH = 4.2? How many grams of salt (NaCl) do I need to add to this buffer to make it a saturated solution of the salt? Thanks

Wow! Exclaimed Sammy. I have reached 47% of my goal! If her goal was 140 points, how many points does she have?

Find the area of the partial circle, use 22/7 for pi. 1.) radius = 27 cm find the area of 1/5 of the circle 2.) diameter = 29 ft find the area of 1/3 of the circle. Help!! Please!! Thanks!! :D

pepi's pizza has a choice of thin crust or thick crust. The available toppings are mushrooms, onions, pepperoni and sausage. Make a tree diagram showing the possible outcomes for a 1 topping pizza.

The combustion of 1.210 g of a mixture of CH4 and C2H6 gives 3.372 g of CO2 I have to determine the composition of the mixture (mastic %) and molar fraction of CH4 in the mixture CH4 + C2H6: CO2 + 2H2O C2H6 + O2: CO2 + H2O CH4 + C2H6 + 02: CO2 +H2O Thanks...

Thanks for your help. I have a problem to solve et don't know how to do part of it. We have a solution of XNO3 (X = monovalent cation We add a solution of K2SO4. We obtain an insoluble sulfate which precipitate and KNO3 The precipitate = 3.900 g The analy...

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Can you give me the result because mine is a negative mass Thank you

Thank you I post my work but there is something wrong For the CO2: M=44 For CH4 M= 16 For C2H6 M= 30 number of mole of CO2= 3,372/44 = 0,766 Could you explain me why you put: Y(4xmm CO2/2mmC2H6)? I would like to use m1/M1 + m2/M2= O,766 and m1+m2= 1,210 b...

thank you for your help. It is very useful I'll do it and post my work

My result is m1=0,96 gr and the pourcentage is 0,96/1,21O = 79% (for CH4) For m2 it is the difference: 21% (for C2H6) but... the result I should found is 75,6% for m1 (for CH4) and 24,4 % for m2 (for C2H6) Thank you for your help

Thank you. It is all right. I've understood. Have a nice day

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