Answer:
acid +base gives salt and water
acid and carbon gives salt and water and carbon dioxide
acid and metal gives salt and hydrogen
Solid: The particles (i.e. atoms or compounds) vibrate about their fixed positions and are relatively very close to each other.
Liquid: The particles move about relatively VERY SHORT distances and move freely, flowing around other particles at high speeds.
Gas: The particles move far from each other about relatively very great distances at high speeds.
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Answer : The number of plates and plate height is, plates and respectively.
Explanation : Given,
Retention time = 407 s
Width of a base = 13.0 s
Length = 12.2 m
First we have to calculate the number of plates.
Formula used :
where,
N = number of plates
= retention time
w = width of a base
Now put all the given values in the above formula, we get:
plates
Now we have to calculate the plate height.
Formula used :
where,
H = height of plate
L = length
N = number of plates
Now put all the given values in the above formula, we get:
Thus, the number of plates and plate height is, plates and respectively.
Answer : The number '3' is a moles.
Explanation :
The given chemical formula is,
As we know that,
For 1 mole of , there are 1 mole of nitrogen and 2 moles of oxygen.
For 3 mole of , there are 3 moles of nitrogen and 6 moles of oxygen.
So, from this we conclude that the number '3' present before represent the number of moles.
Hence, the number '3' is a moles.