Category: Uncategorized

The temperature of a substance is raised but the solubility decreases. Briefly explain why this may happen.

How much energy is required to heat 36.0 g H2O from 65°C to 115°C?  The following physical data may be useful. Show all work on scratch paper to receive full credit.ΔHvap = 40.7 kJ/molCliq = 4.18 J/g.CCgas = 2.01 J/g.CCsol = 2.09 J/g.CTmelting = 0 ∘CTboiling = 100 ∘C

Calculate the freezing point of a solution of 48.4 g of ethylene glycol (C2H6O2) dissolved in 300.0 g of water.  Kf = 1.86°C/m and Kb = 0.512°C/m. Show all work to receive full credit.

Which of the following properties indicates the presence of strong IMFs in a liquid?

∆T=mkfi∆T = mkbiM=molLm = molkg%mass = g g x 100q=mC∆Tq=n∆Ht12=0.693kln[A]t=-kt + ln[A]0 ln(P1P2)=ΔHvapR(1T2-1T1)ln(k1k2)=EaR(1T2-1T1)R=8.314Jmol·K

Consider an `ArrayList` named `list` with 5 elements. What happens if you call `list.remove(5)`?

What is the consequence of modifying a collection (e.g., by calling list.add()) while iterating over it using its iterator, without using the iterator’s own remove() method?

What is the main advantage of a Positional List ADT over a standard List ADT?

Consider the following code snippet for an array-based list: public void add(int i, E e) { if (size == data.length) { throw new IllegalStateException(“Array is full”); } for (int k = size – 1; k >= i; k–) { data[k + 1] = data[k]; } data[i] = e; size++; } If the list contains [A, B, C, D] (size=4) and you call add(1, ‘X’), what is the first value of k for which the loop condition is true?

Which of the following scenarios is a significant weakness for an `ArrayList` but a strength for a `LinkedList`?