A sample of an unknown gas effuses in 12.1 min. an equal volume of h2 in the same apparatus under the same conditions effuses in 2.42 min. what is the molar mass of the unknown gas?

How many moles of CuSO4 are used to make 250 ml of a 0.50 M CuSO4 solution? A) 0.002 mol B) 0.125 mol C) 0.319 mol D) 0.795 mol

What are the four characteristics of minerals

Which compound is an acid? A. HNO3 B. NH3 C. C2H4 D. KCl

What is one factor that can increase the salinity of ocean water?

A drop of water from a special dropper is 3ml. How many liters is this this. A (30) B (0.3) C (0.03) D (0.003)

How does a salt bridge improve a battery

Hat information is needed to determine the energy of an electron in a many-electron atom?

Write the formulas for the following compounds: (a) copper (l) cyanide, (b) strontium chlorite, (c) perbromic acid, (d) hydroiodic acid, (e) disodium ammonium phosphate, (f) potassium dihydrogen phosphate, (g) iodine heptafluoride, (h)

Name a complex salt used in silver-playing.

10. In what part of the world might you find Mystery Island (note: you will be given full-credit for simply attempting this question and you will find the actual answer in your teacher's feedback). Do not answer!