{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Homework #1 - Chemistry 30.101 Homework#1 1 Composition of...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chemistry 30.101 Homework #1 1. Composition of Atoms. How many electrons, protons and neutrons do the followmg neutral atoms have? 11B, 12C, 13C, 20Ne, 2831 2. Valence Electrons. How many valence electrons do the following atoms have? C, Na, Si, N, P, K. Group them in families. 3. Molecular Weight. What are the molecular weights of the following molecules? H202 (hydrogen peroxide), CO (carbon monoxide), C5H5 (benzene), C2H50H (ethanol) , 4. Weights of Atoms and Molecules. In grams, how much does a single atom of gold weigh? In grams, how much does a single molecule of C02 (carbon dioxide) weigh? 5. Moles and Grams. How many moles are there in ten grams of each of the molecules listed in (3)? 6. Moles and Grams. How many grams are there in 1/4 mole of each of the molecules listed in (3)? 7. Balanced Chemical Equation. Write a balanced chemical equation for the combustion (reaction with 02) of C2H6 (ethane) to give H20 and C02. 8. Balanced Chemical Equation. Do the same as in (7) for CH30H (methanol). 9. Yield of a Chemical Reaction. For the reaction in (7) how many grams of H20 and C02 would result if 15 grams of ethane were burned in excess oxygen (assume that the reaction goes 100% to completion)? 10. Limiting Reagent. For the reaction in (8) suppose that one has 16 grams of 02 and 16 grams of methanol. Which reagent limits the amount of product formed? How much (in grams) of each product is formed (assume that the reaction goes as far as it can)? How much reagent (which?) is left? ...
View Full Document

{[ snackBarMessage ]}