2.

Which is the best example of an object that converts electric energy to heat energy?

lamp

toaster

radio

As atoms gain energy, they move faster and slide past one another more easily. Atoms at the surface of the substance overcome attractions to nearby atoms and break free of the surface Which change of state is taking place?

A single bond is almost always a sigma bond, and a double bond is almost always made up of a sigma bond and a pi bond. There are very few exceptions to this rule. Which of the following species have violated this generalization? A. N2 B. O2 C. F2 D.

How many protons are in the nucleus of an atom in beryllium

Given the balanced equation: Fe (s) + CuSO4 (aq) FeSO4 (aq) + Cu (s) What total mass of iron is necessary to produce 1.00 mole of copper? A) 26.0 g B) 55.8 g C) 112 g D) 192 g

Given the incomplete equation for the combustion of ethane (C2H6) : 2 C2H6 + 7 O2 - -> 4 CO2 + 6 ___ H2O2 HCOOH CH3OH H2O

A solution is prepared by dissolving 1.86g of kcl and 8.29g of k2co3 in enough water to make uo the final volume of 500 cm3. What is the concentration of the potassium ion in the solution?

What is the mass of a paperclip?

What process is a physical change

For a half-reaction in an acidic solution, which substances should you add to balance the equation? A. H + and H20 B. H + and OH- C. H20 and NO2 D. OH-

What is the molar mass of mgf2