36 Which compound becomes less soluble in
water as the temperature of the solution is increased?

(1) HCl (3) NaCl

(2) KCl (4) NH_{4}Cl

38 Given two formulas representing the same compound:

Which statement describes these formulas?

(1) Formulas A and B are both empirical.

(2) Formulas A and B are both molecular.

(3) Formula A is empirical, and formula B is molecular.

(4) Formula A is molecular, and formula B is empirical.

40 In a laboratory where the air temperature
is 22°C, a steel cylinder at 100.°C is submerged in a sample of
water at 40.°C. In this system, heat flows from

(1) both the air and the water to the cylinder

(2) both the cylinder and the air to the water

(3) the air to the water and from the water to the cylinder

(4) the cylinder to the water and from the water to the air

EduSolution -

Helping Students

to succeed!

This is one of the absolute best sites I've found online, and I say that as a teacher who has spent countless hours looking for kid-friendly material on the net. I have no idea how you found the time and energy to put it together, but you have my admiration! - Andrew Cowells, Concord Jr. High