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what is sodium

You recently conducted an experiment in your collage laboratory im which acetylglycine was prepared by reaction of glycine with acetic anhydride. Write a report.

6pbo(s)+o2(g) 2pb3o4(s)

How to balance this equation
C7H12O7 + C2H5OH = C6H8O6

How to balance this equation?
C7H12O7 + C2H5OH = C7H12O7

In 10 mL of blood sample pH was 7,56. A high amount of acid was added into the blood. After that volume of CO2 in a sample was 6,13mL. pKa is 6,1. Find concentrations of CO2 and HCO3- in blood.

Please, help me, I almost understand how everything should be calculated, but somewhere I keep thinking faulty I guess because can't get the possible answers anyhow...

Iron is produced by heating iron(III) oxide with carbon (in form of coke) to give iron and carbon dioxide. Calculate the mass of coke needed to react completely with 1kg iron(III) oxide?

M1X and M2X are the salts of a weak base and strong acid. Kh values for them are 10–7 and 10–4 respectively. Kb for M3OH is 10–4 . The decreasing order of base strength would be :
(1) M2OH, M1OH, M3OH
(2) M1OH, M3OH, M2OH
(3) M3OH, M1OH, M2OH
(4) M1OH, M2OH, M3OH

the total number of valence electron in 4.2g of N3 ion is?

a quantity of chlorine gas occupies a volume of 50L at 27c and 721kPa. how many gram of chlorine gas are present