Which of the following for an object should be known to calculate its density

Combination reactions always forms what?

Putting a straw in a glass of water can often make the straw look broken, even though it is in perfect condition. Which of the following best explains why this happens? A. The light creates heat in the water causing the straw to look different. B.

What is the difference between corrosive and flammable

How many grams of aluminum would have the same number of atoms as 6.94 g of lithium?

Zinc reacts with hydrochloric acid according to this reaction: Zn (s) + 2HCl (aq) → ZnCl2 (aq) + H2 (g) Which of the following will react the fastest? a. 2.0 gram lump of zinc in 0.10 M hydrochloric acid b. 2.0 gram sample of powdered zinc in 0.

A mixture of 0.10 mol of NO, 0.050 mol of H2, and 0.10 mol of H2O is placed in a 1.0-L vessel at 300 K. The following equilibrium is established: 2NO (g) + 2H2 (g) ⥫⥬==N2 (g) + 2H2O (g) At equilibrium [NO]=0.062M.

Which statements accurately describe the polarity and electronegativity of water?

Which of the following could lead to static discharge? water molecules sticking together at a surface the force of gravity pulling an object to Earth a vibration compressing molecules of air the build up of electrons on the atoms of an object

Which requires the removal of heat, melting or freezing? Is it evaporation? What is it? Why?

Waves are the major force of erosion along coasts