Multiple Choice
A sample contains 43.7% phosphorus and 56.3% oxygen. The molar mass is 284 u. What is the molecular formula of the compound?
A) P2O5
B) PO3
C) P4O10
D) P4O5
E) P5O8
Correct Answer:

Verified
Correct Answer:
Verified
Q19: Fumaric acid, C<sub>4</sub>H<sub>4</sub>O<sub>4</sub>, can be extracted from
Q21: A 10.0 g sample of bismuth tribromide,
Q22: Choose the INCORRECT name formula combination.<br>A) Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>
Q23: Choose the INCORRECT oxidation state.<br>A) Cl is
Q25: The name of the compound Cr(ClO<sub>4</sub>)<sub>3</sub>∙6H<sub>2</sub>O is
Q26: In which compound does iodine have an
Q27: What is the mass percent of H<sub>2</sub>O
Q29: An unknown organic compound contains carbon, hydrogen,
Q106: Polyatomic ions end in -ate or -ite.
Q110: Hydrates are:<br>A)moisture sensitive hygroscopic inorganic salts<br>B)compounds in