Answer: That means that the concrete will increase it temperatures quicly compared with other substances whose specific heat is higher.
Explanation:
Specific heat is the amounf of heat to raise the temperature of 1 gram of substance (or kg depending on the unis used) 1 Celsius degree.
The water, for example, has a high specific heat. That means that you need to add a great amount of heat to raise its temperature, compared with, for exampple the concrete, which is told to have a smaller heat capacity.
You can see that mathematically form the formula for heat released or absorbed from/by a substance:
Q = mass × Specific heat × ΔT
⇒ ΔT = Q / (mass × Specific heat).
So, for the same mass, a certain amount of heat (Q) will result in a bigger ΔT when the specifif heat is smaller.
Ok first, we have to create a balanced equation for the dissolution of nitrous acid.
HNO2 <-> H(+) + NO2(-)
Next, create an ICE table
HNO2 <--> H+ NO2-
[]i 0.230M 0M 0M
Δ[] -x +x +x
[]f 0.230-x x x
Then, using the concentration equation, you get
4.5x10^-4 = [H+][NO2-]/[HNO2]
4.5x10^-4 = x*x / .230 - x
However, because the Ka value for nitrous acid is lower than 10^-3, we can assume the amount it dissociates is negligable,
assume 0.230-x ≈ 0.230
4.5x10^-4 = x^2/0.230
Then, we solve for x by first multiplying both sides by 0.230 and then taking the square root of both sides.
We get the final concentrations of [H+] and [NO2-] to be x, which equals 0.01M.
Then to find percent dissociation, you do final concentration/initial concentration.
0.01M/0.230M = .0434 or
≈4.34% dissociation.
They rely on scientists for facts and answers
83.9 is the answer i’m pretty sure
Mass is never lost or gained in chemical reactions. So we can say that mass is always conserved. In other words, the total mass of products at the end of the reaction is equal to the total mass of the reactants at the beginning.
This fact allows you to work out the mass of one substance in a reaction if the masses of the other substances are known.