How many grams of hydrogen are necessary to react completely with 50.0 g of nitrogen

A solid and a liquid are shaken together in a test tube to produce a milky mixture that eventually separates into a clear liquid and a white solid. which of the following best describes the mixture?

A platinum wedding band contains 0.077 mol of platinum. How many atoms of platinum are in the 15-gram platinum wedding band?

What is the electron configuration of neptunium?

Which statement best describes the energy of activation? a. it is affected by a catalyst. b. it is lower if the reaction temperature decreases c. it is higher if the reaction temperature increases d.

Which two elements have similar characteristics? indium, lithium, francium, niobium

A catalyst increases the rate of a chemical reaction by

What energy is changed to cell energy in stage 1 of photosynthesis. true or false

A person produces two sound waves with a flute, one immediately after the other. Both sound waves have the same pitch, but the second one is louder. Which of the following properties is greater for the second sound wave?

A voltaic cell is constructed with two silver-silver chloride electrodes, each of which is based on the following half-reaction: AgCl (s) + e-→Ag (s) + Cl - (aq). The two cell compartments have [Cl-] = 1.51*10-2 M and [Cl-] = 2.90 M, respectively.

How many liters of chlorine gas can be produced when 0.98 l of hcl react with excess o2 at stp? 4hcl (g) + o2 (g) - > 2cl2 (g) + 2h2o (g) ?