Chemistry, 28.09.2019 02:30 Spoiledgirl2905
If a sample of nitrogen gas (n2) contains 3.0 x 10^24 atoms of nitrogen, then about how many moles of nitrogen gas are in the sample?
a. 5.0
b. 2.5
c. 3.0
d. 1.0
Answers: 2
Chemistry, 22.06.2019 00:30
This element exists in adundance in the sun.explain how you would go about capturing sunlight.would this captured sunlight contain any of the element?
Answers: 1
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Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
Chemistry, 22.06.2019 22:00
4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.
Answers: 2
If a sample of nitrogen gas (n2) contains 3.0 x 10^24 atoms of nitrogen, then about how many moles o...
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