Which of the following statements is true concerning the electrochemical cell depicted below? Zn | Zn2+(aq) || Cu2+(aq) | Cu? Zn2+(aq) + 2e− Zn(s); E° = –2.87 V

Cu2+(aq) + 2e− Cu(s); E° = –2.38 V

a. The cell reaction is spontaneous with a standard cell potential of 0.49 V

b. The cell reaction is nonspontaneous with a standard cell potential of -0.49 V

c. The cell is at equilibrium

d. The cell reaction is spontaneous with a standard cell potential of 5.25 V

e. The cell reaction is nonspontaneous with a standard cell potential of -5.25 V

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.