The answer is D, Magnesium.
For an anion or cation(negatively or positively charged ion) to replace a similarly-charged ion, it needs to be more active. This means that only a cation that is above Zinc on the reactivity scale can replace Zinc.
Since Aluminum was displaced in the reaction, that means the unknown metal is more reactive.
This means that our options are:
Lithium, Potassium, Calcium, Sodium, and Magnesium.
But because the metal did not displace the Sodium, it must be less reactive than it.
This gives us a new list of metals that are less-reactive than Sodium:
Magnesium, Aluminum, Zinc, Iron, Nickel, etc.
The only metal on both lists is Magnesium, and that means that your answer is D, Magnesium.
Answer:
hit with force when moving.
"she collided with someone"
Similar:
crash (into)
come into collision (with)
bang (into)
slam (into)
impact (with)
hit
strike
run into
meet head-on
smash into
smack into
cannon into
plow into
bump into
crack into/against
knock into
dash against
barrel into -
come into conflict or opposition.
"in his work, politics and metaphysics collide"
Explanation:
Answer:
I think it is called a Mixture
Explanation:
Sorry if it is wrong
Answer:
Option E
Explanation:
As work is dot product of force and displacement
W=FdCos0
As Cos 0=1 so W=F.d(1)
W=F.d
as Cos 90=0 so no work will be done when angle between force and displacement is 90 degree. At angle between force and displacement is 180 degree then negative value com as Cos 180= -1
