Seawater has 5.65 x 10^-3 g of dissolved oxygen in one kilogram of water. Concentration of O2 in parts per million is
Correct answer: A. 5.65
- A. 5.65
- B. 7.69
- C. 5.20
- D. 4.11
Explanation
A is correct since the solution is given asGiven: Water = 103 g(1 kg), Oxygen = 5.65 x 10-3 gRequired : Oxygen in ppm = ?Formula : Ppm = value in gram / amount of water ( solvent ) x 106Ppm = 5.65 x 10-3 / 103 x 106 = 5.65ppmB, C and D are incorrect because these are not correct values in ppm
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Concentration Units
Concentration units express the amount of solute in a given amount of solution or solvent. Calculations cover molarity, molality, normality, mole fraction, mass percentage, volume percentage, parts per million and dilution, including the effect of temperature on volume-based units and the distinction between molarity and molality.
Practise Solutions and Colloids
119 free Solutions and Colloids MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Concentration Units questions
36 g of HCl dissolves in 100 g of solution. The density of HCl is 1.19 gcm-3. The molar mass of the HCl solution will be:
The essential property of a fertilizer is that is should be:
Which term describes a solution in which dissolved solute is in equilibrium with undissolved solute?
Which ion is present in the highest concentration in a 2 mole/cm3 solution of sodium sulfate?
2% solution by weight of sodium chloride solution is prepared. The molality of the solution is:
In one molal aqueous solution of C2H3OH the mole fraction of C2H5OH is :