Iwill give brainiest answer to whoever me, also this problem is worth 20 points

an iron nail (fe) is placed into a solution of copper (ii) sulfate (cuso4). after some time, the blue color of the copper (ii) sulpate disappears and some copper-colored solid (cu) is pound on the surface of the nail. the solution now contains iron (ii) sulfate (feso4), and the container feels warmer than before the reaction.

does this reaction absorb or release energy? how do you know?

what do the color changes in the reaction above indicate?

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .

In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion. what is the frequency f of oscillation?