Balance the following chemical equation:

NH4NO3

N20+

H2O

The diffrence between a glacier and a geyser

The early paleozoic dominated by A. reptiles B. amphibians C. fish D. inverterbrates

Conserving the quality of available water is a high priority world-wide. There are many countries where the water supply is reaching dangerous levels of contamination.

Calcium dissolved in the ocean is used by marine organ - isms to form CaCO3 (s) in skeletons and shells. When the organisms die, their remains fall to the bottom.

Multiple Choice A scientist performs an experiment on an unknown element. She finds that the unknown element forms an ionic bond with beryllium (Be). She concludes that the unknown element must belong in group 2 of the periodic table.

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.