b. .Silver has a lower activity than hydrogen and cannot replace it
Explanation:
The reaction between silver and water cannot proceed because Ag has a lower activity than hydrogen in water.
H₂O + Ag → no reaction
- This reaction is referred to as as single displacement reaction.
- In this kind of reaction, one specie replaces another.
- The replacement of a metallic ion in solution by a metal atom higher in the activity series is the driving force for this reaction.
- Hydrogen is higher than silver and the activity series and will not be displaced by it.
- Therefore, no reaction will occur.
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Starting in 1908, while a professor at the University of Chicago, Millikan worked on an oil-drop experiment in which he measured the charge on a single electron. J. J. Thomson had already discovered the charge-to-mass ratio of the electron.
The answer would be c)centimeter, second, inch :)
Answer:
RbF2 + Ca
Explanation:
Since Rb is located in IIA as well as Ca, Rb has ion form Rb2+
Hence CaF2 + Rb → RbF2 +Ca
Please be reminded, this answer may not be 100% correct
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. ... Cold water is more dense and will sink in room-temperature water.