IV. Choose the best answer from the given alternative
21. How many moles of water are produced when 5 moles of hydrogen and 3
moles of oxygen gases are reacted?
D. 5mol
C. 2mol
B. Smol
A. 6mol
0.5 moles of

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Is a pencil falling to the floor anon contact force, a force, or a contact force