which of the following statements is never true? A. rectangle is a parallelogram B. Trapezoid is a rectangle. C.

Calculate the molar mass of the following using the periodic table: 1.) HCl 2.) ZnF2 3.) K2CO3 4.) FePO4 5.) Cu2S

b. Imagine an unusual life form in which the N atom in an amino acid is changed to a C atom. Could a hydrogen bond in this unusual alpha helix occur? Why or why not?

What is the chemical formula for zinc carbonate? (1) ZnCO3 (2) Zn (CO3) 2 (3) Zn2CO3 (4) Zn3CO3

A number written to the left of a chemical symbol or formula is called a

Energy is required to produce a chemical change during (1) chromatography (2) electrolysis (3) boiling (4) melting

What information does the atomic mass of an element provide

The following diagram represents a vertical cross section of sedimentary rock layers that have not been overturned. Which principle best supports the conclusion that these layers have undergone extensive movement since deposition?

What kind of ions do a sodium atom and a chlorine atom become when a valence electron is transferred from one to the other?

NaOH and bleach have several characteristics in common. They include all BUT one of the characteristics listed.

What is the general form for the simplest type of acid-base reaction?