The complex ion trans-[Co(NH3)4Cl2]+ absorbs light primarily in the red region of the visible spectrum (the most intense absorption is at 680 nm). What is the color of the complex?

A48 g piece of ice at 0.0 ∘c is added to a sample of water at 7.4 ∘c. all of the ice melts and the temperature of the water decreases to 0.0 ∘c. how many grams of water were in the sample?

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?