Answer:
The answer is C.
Explanation:
because measuring the pH of a substance is a chemical property. The substance must react with the litmus paper to determine its adcidity
Answer: leg b, leg c, leg d, leg a, leg e in that order
Explanation: you can tell due to the circumstances
Answer is: the enthalpy is -4383.2 kJ.
Reaction 1: 2M(s) + 6HCl(aq) → 2MCl₃(aq) + 3H₂(g); ΔrH₁ = -725.0 kJ.
Reaction 2: HCl(g) → HCl(aq); ΔrH₂ = -74.8 kJ.
Reaction 3: H₂(g) + Cl₂(g) → 2HCl(g); ∆rH₃ = -1845.0 kJ.
Reaction 4: MCl₃(s) → MCl₃(aq); ΔrH₄ = -476.0 kJ.
Reaction 5: 2M(s) + 3Cl₂(g) → 2MCl₃(s); ΔrH₅ = ?
Using Hess's law (substances that appear in the left and right side of the first, second, third and fourth reaction must cancel out to get fifth reaction):
ΔrH₅ = ΔrH₁ - 6 · ΔrH₂ + 3 · ΔrH₃ - 3 · ΔrH₄.
ΔrH₅ = -725 kJ - 6 · (-74.8 kJ) + 3 · (-1845 kJ) - 3 · (-476 kJ).
ΔrH₅ = -4383.2 kJ.
Answer:
Q = 1964 J
Explanation:
Data Given:
latent heat of fusion for Lead (Lf)= 23.1 J/g
amount of ice (mass) = 85.0 gram
heat required to melt lead (Q) =?
Solution:
Latent heat of fusion: the amount of heat that required to melt certain amount of a substance. The total heat absorbed by substance is proportional to the total heat of fusion of the material.
Formula Used
Q = mLf
Q = heat required to melt a substance
m = mass of the substance
Lf =latent heat of fusion
put values in above formula
Q = mLf
Q = 85 g x 23.1 J/g
Q = 1964 J
Answer:
Hydrogen bonding.
Explanation:
Ammonium lauryl sulfate is also known as ammonium dodecyl sulfate there are two parts in Ammonium lauryl sulfate one is nonpolar hydrocarbon and other part polar sulfate group.
Due to polarity of sulfate group its form hydrogen bond very easily.
It is mainly used as foaming agent the main reason of its use is very much soluble in water and making hydrogen bond with water.