If a star is getting closer, the spectra will become red-shifted (the spectral lines will move towards the side of the red wavelengths). Will the wavelengths be longer or shorter?

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

What will most likely happen when two bromine atoms bond together?

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90