-19.15 degrees Celsius. 254k-273.15=-19.15
You have to subtract 273
Answer:
0.01395mol Cr2O3
Explanation:
the molar mass of Cr2O3 is 151.9904 g/mol
2.12g Cr2O3 x 1 mol/151.9904g = 0.01395mol Cr2O3
It might be c, because he came up with the plum pudding model. or it might be that atoms of the same element are identical, but that's not true cuz ions are different and isotopes are different.
I think you meant K as in kilograms?
If so, the answer should be 0.0052.
