POH + pH = pKw
pOH + pH - pH = pKw - pH
pOH = pKw - pH.
The correct equation used to calculate pOH would be C. pOH = pKw - pH.
Water or also known as H2O
Answer:
86.9 g
Explanation:
Use the conversion factor: 4.82 mol H2O x (18.02g H2O/1 mol H2O)
The moles cancel out so we have to multiply 4.82 x 18.02 = 86.9
The answer is 3 sig. figs.
Answer:
3. 0.36 L to the nearest hundredth
4. 542.40 L to the nearest hundredth
Explanation:
Question 3
Volume = 8.16 L
Number of moles = ?
At STP;
Temperature = 273 K
Pressure = 1 atm
Using the General gas equation;
PV = nRT where R = General gas constant = 0.0821
n = PV / RT
n = (1 * 8.16 ) / (0.0821 * 273)
n = 8.16 / 22.4133 = 0.3641 ≈ 0.36 to the nearest hundredth
Question 4
Volume = ?
Number of moles = 24.2 mol
At STP;
Temperature = 273 K
Pressure = 1 atm
Using the General gas equation;
PV = nRT where R = General gas constant = 0.0821
V = nRT / P
V = 24.2 * 0.0821 * 273 / 1
V = 542.402 L ≈ 542.40 to the nearest hundredth