For the reaction Pb (NO3) 2 + 2KI → PbI2 + 2KNO3, how many moles of lead iodide are produced from 246.2 g of potassium iodide?

Which of the following statements are consistent with Rutherford's nuclear theory as it was originally stated? (A) The volume of an atom is mostly empty space. (B) The nucleus of an atom is small compared to the size of the atom.

In which situation is the acceleration of the car negative? A.) The velocity of a car was 75 km/h B.) The velocity of a car reduced from 50 km/h over one minute C.) The velocity of a car increased from 40 km/h to 75km/h over 15 minutes D.

What is the equilibrium constant, KC if the reaction is a gas phase reaction? (Ans.: Gas: KC = 0.328 dm3/mol)

Which will diffuse through a membrane more rapidly, co or n2? assume that the samples contain only the most abundant isotopes of each element, 12c, 16o, and 14n?

Consider the following half-reactions: Half-reaction E° (V) I2 (s) + 2e - 2I - (aq) 0.535V 2H + (aq) + 2e - H2 (g) 0.000V Zn2 + (aq) + 2e - Zn (s) - 0.

Write the symbol for the ion formed when each element gains electrons and attains a noble-gas electron configuration. Br, H, Se.

A student is planning an investigation of an acid-base reaction. Which of the following is not an accepted method of monitoring the progress of the neutralization reaction? Question 16 options: Conductivity meter pH paper Visual indicator

One light year is about 9 trillion kilometers. Arcturus is a star that is 37 light years from earth. If you are about 11 years old now, how old will you be when light that is leaving Arcturus today reaches earth?

What is melted rock and minerals found below earths crust

What do many bases have in common? A. They often release oxygen gas. B. They often form hydrogen ions. C. They often release hydrogen gas. D. They often form hydroxide ions.