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
From where the tin is obtained? Briefly illustrate it.
Write a short note to describe how to test a gas to see if it was hydrogen or not?
Illustrate is HCl an acid or a base ?
bif3 is ionic while other trihalides are covalent in nature
Elaborate the structure of a DNA molecule?
Select the right answer of the following question.What does not change on changing temperature : (a) Mole fraction (b) Normality (c) Molality (d) None of these
What are the advantages of doing your own chemistry assignments? State your comment?
Provide solution of this question. Which solution will show the maximum vapour pressure at 300 K: (a)1MC12H22O11 (b)1M CH3 COOH (c) 1MNacl2 (d)1MNACl
Can protein act as the buffer? Briefly comment on that statement.
Help me to go through this problem. Lowering of vapour pressure is highest for: (a) urea (b) 0.1 M glucose (c) 0.1M MgSo4 (d) 0.1M BaCl2
18,76,764
1958309 Asked
3,689
Active Tutors
1435077
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!