Time/temperature danger try that answer
The cooling of water vapor has neither the highest nor lowest energy change
Explanation:
In cooling a sample of water vapor at 105°C to 95°C, it is a known fact that this process does not have the highest nor lowest energy change.
- The heat of vaporization from liquid to gas is far higher than the heat of fusion.
- Gases require more separation between their molecules to form their state of matter. This will demand more thermal energy than usual.
All other statements are false and are not correct.
Learn more:
vaporization: brainly.com/question/7580155
phase changes: brainly.com/question/1875234
#learnwithBrainly
Answer:
A. 1.585 x 10^-12 M.
B. 2.512 x 10^-12 M.
Explanation:
A.
citric acid: pH 2.20
pH + pOH = 14
pOH = 14 - 2.20
= 11.80
Remember, pOH = - log [OH]
[OH] = 10^-pOH
= 10^-11.8
= 1.585 x 10^-12 M
B.
Household vinegar: pH 2.40
pH + pOH = 14
pOH = 14 - 2.40
= 11.60
Remember, pOH = - log [OH]
[OH] = 10^-pOH
= 10^-11.6
= 2.512 x 10^-12 M
Answer: 2.008 g
Explanation:
we can use the similar equations as I have before: q = mcAT
we are given q, AT, and c is a constant so now we have to solve for m
84=m(4.184)(10)
m = 2.008 g of water
Answer:
31.5 mL of a 2.50M NaOH solution
Explanation:
Molarity (M) is an unit of concentration defined as moles of solute (In this case, NaOH), per liter of solvent. That is:
Molarity = moles solute / Liter solvent
If you want to make 525mL (0.525L) of a 0.150M of NaOH, you need:
0.525L × (0.150mol / L) = <em>0.07875 moles of NaOH</em>
<em />
If you want to obtain these moles from a 2.50M NaOH solution:
0.07875mol NaOH × (1L / 2.50M) = 0.0315L = <em>31.5 mL of a 2.50M NaOH solution</em>