Is sodium hydroxide dissolves in water a physical change

In the chemical reaction: 2 h 2 (g) o2 (g) → 2 h2o (g), with 8 grams of h 2 (2 grams/mole) and 16 grams of o2 (32 grams/mole) and the reaction goes to completion, what is the excess reactant and how much of that would remain

An electrochemical cell is constructed such that on one side a pure lead electrode is in contact with a solution containing Pb2 + ions at a concentration of 0.002 M.

How are anthropologists able to make generalizations about human behavior? A. by studying isolated groups of people B. by researching the archaeological debris of different societies C. through knowing the regularities in human custom

Carbon dioxide, water, and carbon monoxide are all types of what

What are the correct coefficients for the following reaction: Fe2O3 + Al - > Fe + Al2O3 A) 2, 1, 1, 2 B) 2, 2, 2, 2 C) 1, 2, 2, 2 D) 1, 2, 2, 1

Which unit is used to express the pressure of gas

Draw the structure of the grignard reagent formed from the reaction of p-bromofluorobenzene with magnesium in diethyl ether. click the "draw structure" button to launch the drawing utility.

A sample of gas occupies 6 ml at stp. at what pressure would this sample occupy 500 ml if the temperature is changed to 525◦c? answer in units of torr.

the pressure of the compressed gas is 3.00 atm. if the area of the piston is 0.0590 m^2, what is the force exerted by the gas on the piston in Newton's

In the equilibrium and concentration gizmo, you learned that you can predict the direction of a reaction by comparing the reaction quotient (qc) with the known equilibrium constant kc. you can do the same thing using partial pressures: