Tuesday

July 29, 2014

July 29, 2014

Posted by **hanan** on Tuesday, July 24, 2012 at 11:13pm.

of beryllium dust. How many atoms of beryllium are

present in a room with dimensions of 8 feet by

13.6 feet by 15.6 feet?

Answer in units of atoms

- science -
**drwls**, Wednesday, July 25, 2012 at 8:17amCompute the room volume in ft^3 and convert it to cubic meters.

8*13.6*15.6 = 1797 ft^3 = 50.9 m^3

With 32.7*10^-6 g per m^3, there are 1.66*10^-3 gram of Be dust in the room.

Convert that to moles using the atomic weight of Be (9.0 g/mol), and then use Avogadro's number for the number of atoms.

**Related Questions**

Chemistry - A sample of air contains 21.9ìg/m3 of beryllium dust. How many atoms...

chem - A sample of air contains 14.5 µg/m3 of beryllium dust. How many atoms of ...

ap - A sample of air contains 38.5 ìg/m3 of beryl- lium dust. How many atoms of ...

math - Sam is going to tile a rectangular room that has an area of 64 square ...

Geometry - the walls, floor, and ceiling of a room form a rectangular solid. The...

math - a storage room measures 11.35 feet in length by 9.5 feet in width by 8.3 ...

math - A storage room measures 14.25 feet in length by 12.5 feet in width by 8.4...

math - the lenght of a rectangular room is 6 feet longer than twice the width. ...

Chemistry - Why do beryllium and fluorine combine in a 1 : 2 Ratio? Be is in ...

Math - Preston drew a blueprint of an additional room he is planning to add to ...