Which are the reactants for mg (s) + o2 (g) = mgo (s)

Is tap water a homogeneous or heterogeneous mixture?

What electron configurations so atoms usually achieve by sharing electrons to form covalent bonds

A homogeneous mixture or solution consists of

Part b. 2. the wall of the erlenmeyer flask is occasionally rinsed with water from the wash bottle (see part a. 6) during the analysis of the acid solution.

Whats the answer to the question?

What product (s) forms at the cathode in the electrolysis of an aqueous solution of k2so4?

What element is used as a shield to protect people from radioactive substances?

The frequency of a given region of the electromagnetic spectrum is more than 3 x 1019 HZ. Note that the speed of light is 2.998 x 108 m/s. Which waves are found in this region? A. gamma rays B. visible light C. microwaves D. radio waves E. x-rays

A farmer uses water to irrigate his potato crops. Which roles of water does this examplify

How was helium first discovered?