D. Not all mixtures are heterogeneous
Answer:
Barium oxide, BaO, baria, is a white hygroscopic non-flammable compound
Explanation:
so the answer is BARIUM
7.5x10^14 Hz. I just worked it out on paper.
Explanation:
Using Beer-Lambert's law :
Formula used :

where,
A = absorbance of solution
c = concentration of solution
l = length of the cell
= molar absorptivity of this solution
According to question:
A = (C) : absorbance measured by the spectrometer
c = (B) : concentration, in mol/L, of the stock solution from which the sample was made
l = (A): pathlength of light through the cell
ε = (D) : molar absorptivity, a constant unique to that substance at that wavelength
Answer:
it would be in the keyhole probably
Explanation:
Because you would have to put the screwdriver inside to try and break the lock