Write the name of chemicals that bring permanent hardness in water?

What is true of a molecule? A) each molecule of a compound have different properties B) all molecules of a compound have the same properties C) all molecules of a compound have 1 type of atom D) each atom of a molecule is the same

The shape and surface texture of aggregate particles is important for both Portland cement concrete (PCC) and hot mix asphalt (HMA). For preparing PCC, would you prefer round and smooth aggregate or rough and angular aggregate?

7. Which of the following does not use echolocation? a. Dog b. Bat c. Dolphin d. Submarine

72.983 rounded to 2 significant figures

In ionic bonds what happens to electrons A: nonmetals donate electrons to metals B: nonmetals share electrons C: metals donate electrons to non metals

Rubidium and cesium have similar chemical properties because, in the ground state, the atoms of both elements each have (1) one electron in the outermost shell (2) two electrons in the outermost shell (3) one neutron in the nucleus (4) two neutrons

Identify the major species in solution after the reaction of hydrochloric acid and sodium hydroxide.

What is the purpose of a buffer? a. increase the pH of a solution b. decrease the pH of a solution c. resist changes in pH d. procedure used to determine pH of solution

The concentration of a solution can be expressed in a number of ways. choose the solution expressions that are equal to a solution that contains 1 mg/ml solute.

Which two terms below BOTH describe the igneous rock granite? felsic and extrusive ultramafic and intrusive felsic and intrusive