Other Chemistry Answers

27. What volume of 12.389 M concenterated solution of HCl is required to make 1.00 litre of 0.010 M
HCl?

Find the molality of H2SO4 solution whose specific gravity is 1.98 gm/ml and 90% by volume
H2SO4.

DEAR SIR
A pyrophoric substance is a substance that ignites spontaneously in air at or below 54.55 °C Examples are iron sulfide .can you explain me for example H2S HOW TO BURN WITH OUT SPARK? (CHEMICAL FORMULA OR MECHANISM)
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EDWARD

DEAR SIR
I HAVE AQUESTION ABOUT WATER CHEMISTRY.WHAT IS DIFFERENT BETWEEN TDS (TOTAL DISSOLVE SOLID)AND SALINITY?
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EDWARD

The particles of a solid diffuses with a liquid.... diffusion, acc 2 book means, the movment of the particles on their own... then u dont the particles of the solid diffuse with air????? i jst cant get y.. plzz help!!! and one more... wht is the difference betwn brownian motion and diffusion??

1) Discuss how are elements, compounds, neutrons, protons, atomic number ,mass number and isotopes are related under structure and bonding
(Information should include the interrelationship between the structure and bonding in elements all in detail)

The co-ordination no. of F- in CaF2 is :-
(1) 3 (2) 4 (3) 6 (4) 8

The standard enthalpy of formation for which of the following is zero :-
(1) CH3OH(ℓ)
(2) HF(g)
(3) H2O(ℓ)
(4) F2(g)

Dear sir
in determination H2S in crud oil we used Borax solution 30% to extract H2S from crud oil to borax then acidify with HCl then titration with iodine and thiosulfate sodium.
i want to know why i use Borax ?because i can use NaOH or another base.

Calculate the volume,mass and number of molecules liberated when 299g of sodium reacts with excess water at STP