{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

122_recwk2wi06 key

# 122_recwk2wi06 key - Tempe Arizona were made to walk at...

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

KEY Name________________________________________________ Recitation-TA__________________________ R= 8.314 m 3 Pa /mol K = 0.08206 L atm/mol K 1 Chapter 10 Chemistry 122 (Allen) Recitation - Week 2 Recitation Directions 1. First 15 minutes a. Spend 5 minutes working this problem out - on your own b. Assemble in groups of 3 or 4; compare and agree as a group on the final answer(s) c. One group member will present on the board their group’s results (TA to assign group/member; if no group has the correct answer(s), the TA will present) 2. ~ 15 minutes a. TA will answer homework, lecture, or lab questions as time permits 3. Last 13 minutes of class a. Quiz to be taken in-class (only approved calculators to be used; no use of book or notes allowed) 1. Directly after the Fiesta Bowl, an experimental result was reported in which green aliens from
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Tempe, Arizona were made to walk at different speeds on a treadmill while their air consumption was measured. In one hour, the average alien walking at 0.20 km/hr consumed 10 Liters of Air (21 mole% O 2 content) per kg of alien weight at 1 atm pressure and 24 ° C. How many molecules of O 2 was consumed in 1 hour by this 55.6 kg alien? Answer: 10 L air x 0.21 O 2 = 2.1 L O 2 , now you need to convert to molecules of O 2 by first converting to moles. Use PV=nRT n=PV/RT; [(1 atm)(2.1LO2)]/[(0.08206 Latm/mol K)(24 +273 K)]=0.086165 moles O 2 PER kg 0.086165 moles X 6.022 x 10 23 molecules/mol = 5.18886 x10 22 molecules O 2 PER kg Now multiply by 55.6kg = 2.9 x 10 24 molecules O 2 that the green alien consumed in 1 hour...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online