1) Identify which reaction is NOT a chemical reaction.

A) H2O (g) → H2O (l)

B) 2H2O (l) → 2H2 (g) + O2 (g)

C) AgNO3 (aq) + Cu (s) → Ag (s) + CuNO3 (aq)

D) Pb (NO3) 2 (aq) + 2 NaI (aq) → PbI2 (s) + 2 NaNO3 (aq)

If the atomic radius of aluminum is 0.143 nm, calculate the volume of its unit cell in cubic meters.

What is the heaviest element that can be formed in the stars

Name three stars that are hotter than the sun

Where does reduction take place in an electrochemical cell? A. The anode B. The cathode C. the anode or the cathode D. The half-cell

How does a purebred individual differ from a hybrid individual?

A 0.239 gram sample of a gas in a 100-mL flask exerts a pressure of 603 mm Hg at 14 degrees Celsius. What is the gas?

Which of the following is true about a redox reaction? In a redox reaction, an electron is lost by the reducing agent. In a redox reaction an electron is lost by the oxidizing agent.

Is the equation above balanced? How do you know? Mg + 2HCl → MgCl2 + H2

What characteristics do atoms of carbon-12, carbon-13, and carbon-14 have in common?

Which of the following changes would decrease the rate at which a solid solute dissolves in a liquid solvent? A. Decreasing pressure B. Decreasing surface area C. Increasing rate of stirring D. Increasing temperature