V= d/t
v=speed
d=distance
t=time
So v= 422/3
v =140.667m/s
Lithium is one of element of group 1 of periodic table.
Lithium has the smallest radius than as compared to the other elements, thus the density of the alkali metal is also less.
Lithium when added to water it floats, because of lower density. It eventually fizzes and becomes smaller.
The reaction on lithium and water is:
2Li + 2H₂O --> 2LiOH + H₂ (g)
The hydrogen gas which is liberated is highly flammable.
Thus, lithium salts are insoluble in water.
Density is defined as the mass of a substance per unit volume.
Density = Mass ÷ Volume.
To know more about Alkali metals, refer to this link:
brainly.com/question/5063184
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Answer:
- 0.022% starch/min
Explanation:
Initial Conc. = 0.050 %
Final conc. = 0.028 %
Time = 1 min
Rate of Reaction = Rate of disappearance = Change in concentration of starch / time
Rate of disappearance = [0.028 - 0.050 ] / 1
Rate of disappearance = 0.022 / 1 = - 0.022% starch/min
The negative sign denotes that the starch is disappearing.
