What is the chemical compound for febr2

True or false, the three major scales used to measure earthquakes are mercalli scale, richter scale and magnitude scale

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.