All ionic compounds are polar. This is because ionic compounds consist of ions of opposite charges held together by electrostatic forces of attraction.
Answer:
Pressure = 73.49 atm
Explanation:
The balance chemical equation is as follow,
C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O
According to balanced equation,
1 mole of C₃H₈ on combustion gives = 3 moles of CO₂
So,
2 moles of C₃H₈ on combustion will give = X moles of CO₂
Solving for X,
X = 2 moles of C₃H₈ × 3 moles of CO₂ ÷ 1 mole of C₃H₈
X = 6 moles of CO₂
Now, in second step we will calculate the the pressure exerted by CO₂ at 2.5 L volume and 373 K temperature. For this we will use Ideal gas equation assuming the gas is acting as an ideal gas. Therefore,
Data:
Temperature = T = 373 K
Volume = V = 2.5 L
Moles = n = 6 mol ∴ As calculated above.
Gas Constant = R = 0.0821 atm.L.mol⁻¹.K⁻¹
Formula Used:
P V = n R T
Solving for P,
P = n R T / V
Putting Values,
P = 6 mol × 0.0821 atm.L.mol⁻¹.K⁻¹ × 373 K ÷ 2.5 L
P = 73.49 atm
The density of a substance is equal to its mass divided by its volume. In this case, it is equal to 693.8 g divided by 92.5 mL. The density of the substance is then equal to 7.50 g/mL. It has 3 significant figures because in division, the answer will have the least number of significant figures from the given.
The answer is A. The pH decreases