Question

To (100.0 ± 0.2) cm3 of calcium chloride (0.010 ± 0.002) mol dm-3 was added (20.00 ± 0.03) cm3 of iron (II) chloride (0.213 ± 0.002) mol dm-3. Determine the exact concentration of the chloride ion.

Answer 1

Answer:

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Answer 2

Answer:

In what proportions may a manufacturing pharmacist mix 20%, 15%, 5%, and 3% zinc oxide ointments to produce a 10% ointment? Relative amounts: 7:5:5:10, answer. Relative amounts: 5:7:10:5