Answer: The
gas occupies a space of 5.57 L at 26 Celsius and 101.75 kPa.
Explanation:
Given: Mass = 26 g
Pressure = 101.75 kPa
Convert kPa into atm as follows.
![1 kPa = 0.00986923 atm\\101.75 kPa = 101.75 kPa \times \frac{0.00986923 atm}{1 kPa}\\= 1 atm](https://tex.z-dn.net/?f=1%20kPa%20%3D%200.00986923%20atm%5C%5C101.75%20kPa%20%3D%20101.75%20kPa%20%5Ctimes%20%5Cfrac%7B0.00986923%20atm%7D%7B1%20kPa%7D%5C%5C%3D%201%20atm)
Temperature = ![26^{o}C = (26 + 273) K = 299 K](https://tex.z-dn.net/?f=26%5E%7Bo%7DC%20%3D%20%2826%20%2B%20273%29%20K%20%3D%20299%20K)
Now, moles of a substance is defined as mass of substance divided by its molar mass.
As molar mass of 2,2 dimethyl hexane is 114.23 g/mol. So, its number of moles are calculated as follows.
![No. of moles = \frac{mass}{molar mass}\\= \frac{26}{114.23 g/mol}\\= 0.227 mol](https://tex.z-dn.net/?f=No.%20of%20moles%20%3D%20%5Cfrac%7Bmass%7D%7Bmolar%20mass%7D%5C%5C%3D%20%5Cfrac%7B26%7D%7B114.23%20g%2Fmol%7D%5C%5C%3D%200.227%20mol)
Formula used to calculate the volume is as follows.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula as follows.
![PV = nRT\\1 atm \times V = 0.227 mol \times 0.0821 L atm/mol K \times 299 K\\V = 5.57 L](https://tex.z-dn.net/?f=PV%20%3D%20nRT%5C%5C1%20atm%20%5Ctimes%20V%20%3D%200.227%20mol%20%5Ctimes%200.0821%20L%20atm%2Fmol%20K%20%5Ctimes%20299%20K%5C%5CV%20%3D%205.57%20L)
Thus, we can conclude that the
gas occupies a space of 5.57 L at 26 Celsius and 101.75 kPa.
Answer:
The answer to your question is: Arrhenius base
Explanation:
Arrhenius base ; an Arrhenius base is able to produce (OH-) in water, so Ca(OH)2 is an Arrhenius base.
Brønsted-Lowry base
. An Bronsted and Lowry base is able to accept a proton, Ca(OH)2 can do it.
Lewis base
this base is able to donate a pair of electrons, Ca(OH)2 does not have a pair of electrons to donate.
All of the above. This option is wrong only the first option is correct.
pH of solution = 9.661
<h3>Further explanation
</h3>
pH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.
pH = - log [H⁺]
So that the two quantities between pH and [H⁺] are inversely proportional because they are associated with negative values.
pOH=-log[OH⁻]
![\tt pOH=-log[4.583\times 10^{-5}]\\\\pOH=5-log~4.583=4.339](https://tex.z-dn.net/?f=%5Ctt%20pOH%3D-log%5B4.583%5Ctimes%2010%5E%7B-5%7D%5D%5C%5C%5C%5CpOH%3D5-log~4.583%3D4.339)
pH+pOH=pKw
![\tt pH=14-4.339\\\\pH=9.661](https://tex.z-dn.net/?f=%5Ctt%20pH%3D14-4.339%5C%5C%5C%5CpH%3D9.661)
Explanation:
The kilometre (SI symbol: km; /ˈkɪləmiːtər/ or /kɪˈlɒmɪtər/), spelt kilometer in American English, is a unit of length in the metric system, equal to one thousand metres (kilo- being the SI prefix for 1000).