Answer: this is dinitrogen dyhidride.
Explanation:
Answer:
8. B
9. D
10. A
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Answer:- The pH of the buffer solution will be 4.04 .
Solution:- Sodium acetate added to acetic acid makes a buffer solution and the pH of buffer solution is easily calculated by using Handerson equation:
We are adding 25.00 mL of each, so the total volume of the buffer solution will be 50.00 mL.
We can calculate the concentration of base which is sodium acetate and acid by using dilution equation:
for base:
Similarly, for acid:
pKa is calculated from given Ka value as:
pKa = 4.74
Let's plug in the values in Handerson equation:
pH = 4.74 - 0.70
pH = 4.04
Taking into account the definition of calorimetry, sensible heat and latent heat, the specific heat capacity of the material is 0.203 .
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
The amount of heat a body receives or transmits is determined by:
Q = c× m× ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case, you know:
Replacing in the definition of amount of heat:
1220 calories= c× 100 g× 60 C
Solving:
c= 1220 calories÷ (100 g× 60 C)
<u><em>c= 0.203 </em></u>
Finally, the specific heat capacity of the material is 0.203 .
Learn more about calorimetry:
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Answer: all mass takes up space. everything has mass. Theres a unit of mass called a slug thats not the bug!
The answer to your question is pH = 9.08
Data
pH = ?
Concentration = 1.2 x 10⁻⁵ M
Process
1.- Calculate the pOH of the solution
Formula
pOH = -log[OH⁻]
pOH = -log[1.2 x 10⁻⁵]
pOH = 4.92
2.- Calculate the pH
pH = 14 - pOH
Substitution
pH = 14 - 4.92
Result
pH = 9.08