Many metals pack in cubic unit cells. The density of a metal and length of the unit cell can be used to determine the type for packing. For example, platinum has a density of 21.45g/cm3 and a unit cell side length a of 3.93 Å. (1 Å = 1. 10-8 cm.)
A) How many platinum atoms are in exactly 1 cm3?
B) How many unit cells are in exactly 1 cm3?
C) How many platinum atoms are there per unit cell?
D) The atoms/unit cell suggests that platinum packs as a unit cell.
E) What is the atomic radius of platinum?

Predict the products butane (c4h10) + oxygen —>

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units:

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.