Heat is probably the easiest energy you can use to change your physical state. The atoms in a liquid have more energy than the atoms in a solid. There is a special temperature for every substance called the melting point. When a solid reaches the temperature of its melting point, it can become a liquid.
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.
Both those acids are strong acids, so it's a titration with a strong acid and a strong base, creating a neutralization reaction.
a) The pH before any NaOH has been added would just be the -log[HCL]. -log[.1] is equal to 1.
b) First, figure out how many mmol of HCl you have. x/25=.1 would be 2.5 mmol of HCl. There's x/10=.1 of NaOH, so you have 1 mmol of NaOH. 1 mmol of the HCl reacts away, so you have 1.5 mmol of HCl in 35 mL. 1.5/35 = .042 M. -log(.042) = 1.38.
c) In a titration with a strong acid and a strong base, the pH at the equivalence point is always equal to 7.
d) Now you have 10 mL beyond the equivalence point. We need to figure out how much was added to get to the equivalence point so we can calculate the concentration of NaOH to find the pOH and then pH. Well, since they have equal concentrations, it would be 25 mL of NaOH, plus the 10 we just added. So we have 35 mL + 25 mL of the HCl, which is 60 mL total. If we had 35 mL of NaOH originally, that would be 3.5 mmol of NaOH (x/35=.1). 3.5/60 is .0583. -log.0583 is 1.23. pH = 14 - pOH. 14 - 1.23 = 12.77
Yes it will float
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Answer:
Some metals can be extracted from compounds by heating with carbon atom because they are less reactive than carbon and some metals cannot be extracted because they are more reactive than carbon atom.
Explanation: If the metal is less reactive than carbon atom so the carbon atoms make bond with oxide or other atom present with metal and the metal is free from that oxide or that element. But if the reactivity of metal is higher than carbon is unable to remove the oxide or element.