Which of the following elements has both metallic and nonmetallic properties?

A. Ar

B. Ge

C. Mg

D. S

Why does diving 30m below sea level affect our bodies more than being in a building 30m above sea level?

Dalton incorporated the law of conversation of mass into his atomic theory by asserting that? A. atoms are indivisible. B. atoms of different elements have different properties. C. matter is composed of atoms. D.

What is the molar mass of chcl3?

Calculate the number of mol of solute in 8.00 * 102 mL of 0.250 M HCl.

7. How many moles of FeCl3 are needed to produce 805 grams of MgCl2? A. 157 moles B. 450 moles C. 5.64 moles D. 7.35 moles

Use the concept of natural selection to explain why organisms typically adapt over time.

You might separate a mixture of aniline, p-cresol, benzoic acid, and toluene using ordinary laboratory reagents. 1. dissolving the mixture in a water-immiscible organic solvent - NaHCO3, H2O, CH2Cl2 2.

A chemical element is a pure substance that consists entirely of one type of what

Calculate the mass percent composition of sulfur in Al2 (SO4) 3. Calculate the mass percent composition of sulfur in Al2 (SO4) 3. 28.12 % 42.73 % 35.97 % 9.372 % 21.38 %

What is a striking a match an example of