topic1

Chemistry (Hm Chemistry College Titles)

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
I. Chemical Formulas and Composition Stoichiometry 1. Forms monatomic ions with a 2 - charge in solutions. (A) F (B) S (C) Mg (D) Ar (E) Mn Answer: B 2. Forms a compound having the formula KXO 4 (A) F (B) S (C) Mg (D) Ar (E) Mn Answer: E 3. A 27.0-gram sample of an unknown hydrocarbon was burned in excess oxygen to form 88.0 grams of carbon dioxide and 27.0 grams of water. What is the possible molecular formula of the hydrocarbon? (A) CH 4 (B) C 2 H 2 (C) C 4 H 3 (D) C 4 H 6 (E) C 4 H 10 Answer: D 4. What mass of Au is produced when 0.0500 mol of Au 2 S 3 is reduced completely with excess H 2 ? (A) 9.85g (B) 19.7g (C) 24.5g (D) 39.4g (E) 48.9g Answer: B 5. When hafnium metal is heated in an atmosphere of chlorine gas, the product of the reaction is found to contain 62.2 percent Hf by mass and 37.4 percent Cl by mass. What is the empirical formula for this compound? (A) HfCl (B) HfCl 2 (C) HfCl 3 (D) HfCl 4 (E) Hf 2 Cl 3 Answer: C 6. After completing an experiment to determine gravimetrically the percentage of
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 04/08/2008.

Page1 / 2

topic1 - I Chemical Formulas and Composition Stoichiometry...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online