B. A great deal of heat must be absorbed by water to break hydrogen bonds and allow molecules to move farther apart.
The formula here is:
pH = -log[H+]
3.6 = -log[H+]
[H+] = 2.51 x 10⁻⁴ mol / Liter
The first option is correct.
Since density is in g/cm3 we convert 4.77kg= 4770 gram
d= m/v 7.86= 4770/v v=606.87 cm3
now converting cm3 to dL
1 cm3= 0.01 dL
v= 606.87*0.01=6.0687 dL
Answer: There are
molecules present in 183.2 grams of
gas.
Explanation:
Given: Mass = 183.2 g
Number of moles is the mass of substance divided by its molar mass.
As molar mass of water is 18 g/mol. Therefore, moles of
are calculated as follows.
![Moles = \frac{mass}{molar mass}\\= \frac{183.2 g}{18 g/mol}\\= 10.17 mol](https://tex.z-dn.net/?f=Moles%20%3D%20%5Cfrac%7Bmass%7D%7Bmolar%20mass%7D%5C%5C%3D%20%5Cfrac%7B183.2%20g%7D%7B18%20g%2Fmol%7D%5C%5C%3D%2010.17%20mol)
According to the mole concept, there are
molecules present in one mole of a substance.
Hence, molecules present in 10.17 moles are calculated as follows.
![10.17 mol \times 6.022 \times 10^{23}\\= 61.24 \times 10^{23}](https://tex.z-dn.net/?f=10.17%20mol%20%5Ctimes%206.022%20%5Ctimes%2010%5E%7B23%7D%5C%5C%3D%2061.24%20%5Ctimes%2010%5E%7B23%7D)
Thus, we can conclude that there are
molecules present in 183.2 grams of
gas.