1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Verizon [17]
3 years ago
7

20 mL of 80°C water is mixed with 20 mL of 0°C water in a perfect calorimeter. What is the final temperature?

Chemistry
1 answer:
d1i1m1o1n [39]3 years ago
8 0
The temperature is 60°
You might be interested in
H-h+cl+cl____2h-cl... calculate the energy needed to break the bond​
Elenna [48]
The energy required to break one mole of Cl - Cl bond is 242 kJ/mol
4 0
3 years ago
What is the molecular shape and bond angle at the indicated carbon?
aliina [53]

Answer:

bond angles of 120 degrees.

7 0
2 years ago
Calculate the bond energy per mole for breaking all the bonds in methane, CH4. Express your answer to four significant figures a
lesantik [10]

The energy that is essential to break one C-H bond is 414 kJ/mol. Since, there are four C-H bonds in CH4, the energy Δ HCH4 for breaking all the bonds is calculated as Δ HCH4 = 4 x bond energy of C-H bond. By multiplying the 4 with the 414 kJ/mol you can get the answer of 1656 kJ/mol CH4 molecules.

4 0
3 years ago
Read 2 more answers
The leaves of the rhubarb plant contain high concentrations of diprotic oxalic acid (hooccooh) and must be removed before the st
Andrei [34K]
First we have to find Ka1 and Ka2
pKa1 = - log Ka1 so Ka1 = 0.059
pKa2 = - log Ka2  so Ka2 = 6.46 x 10⁻⁵
Looking at the values of equilibrium constants we can see that the first one is really big compared to second one. so, the pH will be affected mainly by the first ionization of the acid.
Oxalic acid is H₂C₂O₄
H₂C₂O₄      ⇄     H⁺   + HC₂O₄⁻
0.0356 M            0          0
0.0356 - x            x          x
Ka1 = \frac{[H^+][HC2O4^-]}{[H2C2O4]} = x² / 0.0356 - x
x = 0.025 M
pH = - log [H⁺] = - log (0.025) = 1.6
5 0
3 years ago
When the reaction shown is correctly balanced, the coefficients are HNO3 + KOH → KNO3 + H2O
GuDViN [60]
Coefficients are 1,1,1,1
4 0
3 years ago
Other questions:
  • Which statement is true about writing chemical formulas of covalent compounds?
    6·2 answers
  • Which quantity is used to generate the error bars on a graph?
    11·1 answer
  • A weak monoprotic acid is titrated with 0.100 MNaOH. It requires 50.0 mL of the NaOH solution to reach the equivalence point. Af
    5·1 answer
  • What may happen to the electron when it loses its energy?
    13·2 answers
  • Which drug presents the greatest challenges to forensic science
    5·1 answer
  • What is the wavelength range,in nanometer,for infrared light? In what portion of this range does the earth receive IR from the s
    7·1 answer
  • . Calculate the pH of a solution made by dissolving 1.87 g of sodium caproate, NaC6H11O2, Kb =
    7·1 answer
  • Why finger print is the cheapest and easiest method of personal identification?​
    10·1 answer
  • The greater the resistance, the less current there is for a given voltage.
    12·1 answer
  • how does the involvement of energy in a decomposition reaction compare to how energy is involved in a combustion reaction?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!