After running a marathon, a runner has muscle pain and

cramping. What might have occurred in the muscle cells to

cause this?

What is the meaning of the red moon?

What two gases result from the complete oxidation of a hydrocarbon

Major groups of minerals include

A student pushes a box with a total mass of 50 kg what is the net force omn the box if it accelerates 1.5 m/s squared

For which of the following processes would you expect there to be an increase in entropy? Ag + (aq) + Cl - (aq) AgCl (s) H2O (g) H2O (l) CaBr2 (s) Ca+2 (aq) + 2Br - (aq) CO2 (g) CO2 (s) N2 (g) + 3F2 (g) 2NF3 (g)

Water obtained from natural resources does not show neutral pH. What is the reason behind this? The neutral nature of water changes due to its ability to dissociate into H + and OH - ions.

What Element is H? a. Calcium b. copper c. Tin d. aluminum

Weight measures A. How dense an object is. B. How large an object is. C. The amount of mass in an object. D. The effect of gravity on an object.

Valencies of all the elements in the periodic table

How many electrons does it take to fill the outer energy level of most atoms