A redox reaction employed in an electrochemical cell has a negative . Which statement is true? a) E∘cell is positive b) K>1 E∘cell is positive c) K<1 E∘cell is negative d) K<1 E∘cell is negative e) K>1

What is the density of the black hole

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

Compare and contrast the bohr model and the electron cloud models of the atom.