A sample of iron has the dimensions of 2.0cm X 3.0cm X 2.0cm. If the mass of this rectangular-shaped object is 94.0g, what is the density of iron?

Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive