Determining concentration in ppm
A 500 gm tooth paste sample has 0.2g fluoride concentration. Determine the concentration of F in terms of ppm level: (a) 250 (b) 200 (c) 400 (d) 1000Answer: (c) F-ions in ppm = (0.2/500) x 106 = 400
What is main difference among anti-aromatic and the non-aromatic compounds?
In some two component, solid liquid systems, a solid compound forms.In systems in which the components have an interaction for such other, a solid state compound of the two compounds of the two components can form.Formic acid and formaide form a solid state, one-to-one com
Give me answer of following question. The sum of the mole fraction of the components of a solution is : (a) 0 (b) 1 (c) 2 (d) 4.
While a substance is dissolved in a solvent, the vapour pressure of the solvent is decreased. This results in: (a) An increase in the boiling point of the solution (b) A decrease in the boiling point of solvent (c) The solution having a higher freezing point than
Whether HCl is a base or an acid? Briefly state your comments?
parachloroaniline is strong base than paranitroaniline
Energy changes in some chemical reactions can be used to deduce the energies of chemical bonds. Our understanding of the molecular basis of thermodynamic properties is extended when we ask why the enthalpy change for a reaction is what it is. We deduce,
is entropy on moleculare basis relates to the tras.,vib.,and rotational motions?
Which is more reactive towards nucleophilic substitution aryl halide or vinyl halides
what is the meaning of fourth power of valency of an active ion?
18,76,764
1961484 Asked
3,689
Active Tutors
1425436
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!