A material has a density of 8.9g/cm^3. You have six cubic centimeters of the substance. What is the material's mass in grams?
Conditions for an experimental chemistry reaction require a temperature of 300K. The temperature in the lab is 55dgF. Which of the following must you do to meet the requirements? (dgF=9/5(K-273)+32)
decrease the room temperature by 12dgC
increase the room temperature by 18 K
decrease the room temperature by 33dgF
increase the room temperature by 26dgF
How many grams are in a 5 pound sample?
Please help me, these are the only three questions that I am confused about, out of 20. Thanks!
1) Density = Mass / Volume
Mass = Volume x Density
Mass = 8.9 x 6
Mass =53.4 grams
2) The experiment must be done at the temperature of 300K.
300K - 273K(Absolute temp) =27 C - The Lab temperature must be very close to this =~300K
This temp. of 27C =[27 x 9/5] + 32 =80.6F. Since the Lab temp. is 55 F, then you must INCREASE the
Lab temp. by: 80.6 - 55 =25.6 =~26 F.
Because: 26F + 55F =81F = ~27C = 300K.
1 Pound =453.5924 grams
5 x 453.5924 =2.268 x 10^3 grams.