a solution of prepared by dissolving 20.0 brams of mavni fluride (MgF2) in 80.0 of water (H2O). whag is the mole fraction of mag
1 answer:
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Answer: 3 bromite ions and
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here scandium is having an oxidation state of +3 called as cation and bromite is an anion with oxidation state of -1 called as
. Thus 1 Scandium ion combines with three bromite ions and their oxidation states are exchanged and written in simplest whole number ratios to give neutral
Answer:
The cuvette will only fit into the spectrophotometer in one orientation.
Explanation:
There is an arrow always marked on the cuvette that indicates how to place it inside the spectrophotometer. The sides of the cuvette also have small edges that if light passes through them, spurious light can be detected due to poor positioning. The spurious light does not get through the entire sample, if we want to measure the absorbance. With a cuvette in the indicated position, the procedure is measured and its reference value is taken, and then compared with other cuvettes to be used.
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