The weak ionization constant (Ka) for HCO3 is equal to:A
[H3O+][CO32-)
[HCO3-)
(HCO3-)
[H3O+][CO32-1

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer