CH-1976
The mole
Chemistry · Secondary 4 · Medium · The mole
A 250 cm³ sample of river water contains 5.00 × 10⁻⁴ mol of dissolved oxygen, O₂.
What is the concentration of dissolved oxygen in the water, in mg/dm³?
(Relative formula mass of O₂ = 32.)
What is the concentration of dissolved oxygen in the water, in mg/dm³?
(Relative formula mass of O₂ = 32.)
- 16.0 mg/dm³
- 32.0 mg/dm³
- 64.0 mg/dm³
- 128 mg/dm³
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