When a 500. gram sample of water at 19.0oC absorbs 8.40 kiloJoules of heat, the temperature of the water will change to?

A) 23.0oC B) 19.0oC

C) 15.0oC D) 4.00oC

How some solutions can conduct electricity while others not?

4. The type of society that has the greatest energy needs is the __ A hunting society B agricultural society C industrial society D gathering society

Which volume, in cm3, of 0.20 mol dm-3 naoh (aq) is needed to neutralize 0.050 mol of h2s (g) ? h2s (g) + 2naoh (aq) → na2s (aq) + 2h2o (l) ?

Are the noble gases considered inert or reactive? Why?

4. You are preparing 250 mL of gel mix for protein electrophoresis, which requires a final concentration of 1.6% SDS. The lab has a 10% stock solution of SDS.

An aqueous solution is made from a molecular compound rather than from an ionic compound. If some ions are present in solution, which best describes the solute? A. a weak electrolyte B. a nonelectrolyte C. a strong electrolyte D.

Which of the following measures the radiation given off by atoms per second?

What is the name of the outermost layer that forms a boundary around the outside of each cell

What does an ionic compound form?

How many electrons in an atom could have these sets of quantum numbers n=7 l=3 ml=-1?