Answer:
The four major methods of separation and purification techniques in the laboratory are as follows,
1. Chromatography
2. Recrystallization,
3. Distillation, and
4. Extraction
Spectroscopy however is not a common separation and purification method
Explanation:
Mass spectrometer separates ions in respect to the ratio of their mass to the their charge and are then detected based on their relative abundance this technique is used in the analysis of biomolecules
Protons, it was once organized by atomic mass but organizing by protons turned out to be better
Answer:
The mass of S that reacted is 0.642g
Explanation:
In this case we have
⇒ mass of crucible and cover, 25.429g
⇒ mass of crucible, cover, and Pb, 29.465g
⇒ mass of crucible, cover and commass of crucible and coverpound formed, 30.107g
The mass of Pb reacted = mass of crucible, cover, and Pb - mass of crucible and cover = 29.465 - 25.429 = 4.036g
The mass of compound formed = mass of crucible, cover and commass of crucible and coverpound formed - mass of crucible and cover = 30.107 - 25.429g = 4.678g
The mass of S reacted = Mass of compound formed - mass of Pb reacted = 4.678 -4.036 = 0.642g
The mass of S that reacted is 0.642g
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