Which substance has a chemical formula with the same ratio of metal ions to nonmetal ions as in potassium sulfide?
(1) sodium oxide
(2) sodium chloride
(3) magnesium oxide
(4) magnesium chloride

How do you determine the percent yield of a chemical reaction

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?

What is the temperature in kelvin of a gas if it is allowed to expand from 1.50 l to 4.50 l? the initial temperature is 10.0°c and pressure is constant throughout the change. which equation should you use? t2= v2/v1 t1 what is the final temperature? ⇒ 849 k these are the answers.