4Al (s) + 3O2 (g) __> 2Al2O3 (s)

Why is it difficult to dispose of the waste rock

The two naturally occuring isotopes of chlorine are 35cl and 37cl. based on the average atomic mass of cl (35.5 amu), what is the approximate natural abundance of 35cl?

Element X had a mass of 300g and a 1/2 life of 10 years. how many grams will remain after 40 years?

Arrange the following in order of size, from smallest to largest: polymer, monomer, carbon atom, macromolecule.

What is the first basic metal on the periodic table

What is released when a election returns to a lower state of energy

Which of the following elements has its highest energy electrons in an "s" atomic orbital? radiium (Ra) neon (Ne) aluminum (Al) lanthanum (La)

About how long does it take for the Sun to make one rotation on its axis?

Does a physical change affect the identity of a substance

If the cost of electricity is 8 cents/kWh, how much will it cost to use the light for a whole year (365 days) ?