The first discovery, as opposed to first commercial application, of the water-soluble material used in contact lens is an example of:

What is the molarity of a solution containing 501mL with 35g NaCl

Diffusion between two gases occurs most rapidly if the gases areat a a. low temperature and the molecules are small. b. low temperature and the molecules are large. c. high temperature and the molecules are large. d.

what are the atomic number and the atomic mass of the element formed when 218/84 Po emits a beta particle? what are they when the polonium emits an alpha particle?

Which of the four hypothetical substances you investigated would be most harmful to living organisms

How many moles of H + (aq) ions are present in 750 mL of 0.65 M hydrochloric acid?

Which city's climate is most similar to Jakarta, Baltimore or Kuala Lumpur? Data Table Shanghai, China (31° N, 121° E) Baltimore City, USA (39° N, 76° W) Helsinki, Finland (60° N, 24° E) Banff, Canada (51° N, 115° W) Kuala Lumpur, Malaysia (3° N

State four uses of protein in human body?

If a particular ore contains 55.1 % calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg of phosphorus? Express your answer with the appropriate units.

Which best describes thermal energy? It is the difference between internal energies of two or more substances It is the sum of internal energies of two or more substances O It is the portion of internal energy that can be transferred from one

According to Neil's Bohr's atomic model, what occurs when an atom absorbs radiated energy? A) an electron shifts from a lower energy to a higher one B) an electron shifts from a higher energy lever to a lower one C) an electron spirals towards the