A solution contains 23 ppm of dissolved oxygen in 242.0066 ml of solution. What is the mass of oxygen?

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided