Posted by Nicole on Monday, October 3, 2011 at 10:18pm.
Your bedroom is 18 ft long and 15 ft wide, and the distance from floor to ceiling is 8 ft 6 in. You need to know the volume of the room in metric units for some scientific calculations.
(a). What is the roomâ€™s volume in cubic meters?
(b). What is the mass of air in the room in kilograms? (Assume density of air is 1.2 g/ L and the room is empty of furniture.)

Chemistry  DrBob222, Monday, October 3, 2011 at 10:56pm
ft x 12"/ft x 2.54 cm/in x 1m/100cm = ?meters
Convert 18ft, 15 ft, an 8.5ft to meters, then volume = length x width x height. That will give you #1.
For #2, convert cubic meters to liters (I would go from cubic meters to cc, then to L), then volume x density = mass in grams.

Chemistry  Nicole, Monday, October 3, 2011 at 11:12pm
ok quick question i got the lxwxh and then that would be # 1 .. for i take the answers from one and convert them to liters.. ?/

Chemistry  DrBob222, Monday, October 3, 2011 at 11:15pm
There are 100 cm in 1 m; therefore,
?cubic meters x (1m/100 cm)^3 = x cc.
Then convert x cc to liters (you remember 1000 cc = 1L)

Chemistry  Nicole, Monday, October 3, 2011 at 11:16pm
ok so a was 84.9 vol .. so i take that and then.. i then take the m and convert them to kil.. then do the vxd=m

Chemistry  Nicole, Monday, October 3, 2011 at 11:28pm
ok for 2 i did m= 1.2g/l /84.9= .0141 then moved dec. 3 places which made it 14.1 kg is that right or close..

Chemistry  DrBob222, Monday, October 3, 2011 at 11:41pm
No, for two reasons.
#1. I think the volume is closer to 65 m^3 so you need to rethink that part.
#2. I screwed up on the conversion of m^3 to cc.
m^3 x (100cm/1m) x (100 cm/1m) x (100 cm/1m) = x cc. Divide that by 1000 to convert to L. I think the answer is close to 65,000 L.
65,000 L x 1.2 g/L = ?grams and grams/1000 = kg. My final answer is about 78 kg.
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