Answer:
Second one
Explanation:
I think it's the second cause there's no energy w/o heat. So it's the second.
The mixing of Ni(NO3)2(aq) and Na2CO3(aq) will result in a precipitation reaction.
Ni(NO3)2(aq) + Na2CO3(aq) =====> NiCO3(s) + 2NaNO3(aq)
:-) ;-)
I think B sorry if I’m wrong
Explanation
Burying all of the methanol results in a hotter temperature so because flaming is attempting to ignite the dried salts.
That's because as the methanol is eaten to the finish, the flame approaches the dry salts and attempts to ignite them.
It is therefore critical to extinguish the flame even before methanol is entirely consumed.
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Answer:
FAS concentration = 1.61*10^-4M
Explanation:
Beer Lambert's law relates the absorbance (A) of a substance to its concentration (c) as:
where ε = molar absorption coefficient
l = path length
A plot of 'A' vs 'c' gives a straight line with slope = εl
In addition absorbance (A) is related to % Transmittance (%T) as:
A = 2-log%T----(2)
For the FAS solution, the corresponding calibration fit is given as:
y = 3678(x) + 0.056
This implies that the slope = εl = 3678
It is given that %T = 25.6%
Based on equation(1):