University:
Felician University
Course:
CHEM-105 | Principles of Chemistry
Academic year:

2023
Views:

436

Pages:

2
Author:

Clint W.

\2,.-е,� A:1\'E:,1r,Jtr Name Period__ Date ____ More Average Atomic Mass . }alculate the average atomic masses. Round all answers to two decimal places. 1'\110+ m1:ans -ц,.�_,,.-.... o,r<..,, 1,·� PC•(C.V +i,ce t:, � у 1. Wha't is the atomic mass of hafnium if, out of every�ms 5 have а mass of 176, 19 have а mass of 177, 27 ha е а mass of 178, 14 have а mass of 179, апа-35 have а mass of 180.0? ' �,., 1 • 1 • ' ,... f •- · • - {• -, r 1 1 r: 1""\\ L ·, • . 1 -� " r • ? \) � - ; '-Р ) т , , ...,_ . и� l г-г l' r r / а,:' "". � о!:2. f'A.O.. SS _. \ V\J1\: �; vr,,....,, 2. lodine is 80% 1271, 17% , io (12."=t-) 126 r . 1-i, 5 1, and 3% 128 1. Calculate the average atomi'c mass of iodine. ·11G,. ., . O,..r ·-.,__ [") +- .·oi (_ \ 2- �) f 3. Calculate the average atomic mass of gold with the 50% being gold-197 and 50% being gold-198. t ,(.,; (,! °' 'v. (1 q l- 1 � -A-{ъrr 1 (. l"!t. d � S� (d.. 4. Calculate the average atomic mass of lithium, which occurs as two isotopes that have the following atomic masses and abundances in nature: 6.017 u, 7.30% and 7.018 u, 92.70%. 'l- . J ( � о \ --=t- -t- -=т-о --- , :) '( 5. Hydrogen is 99% 1 Н, 0.8% 2Н, and 0.2% 3Н. Calculate its average atomic mass. ,9 q ( � . о \/'А.� L -t .f)O о{- t\ • ;_. () ,, -· ,О - ' ,..., . о j 6. Calculate the average atomic mass of magnesium using the following data for three magnesium isotopes. re/ative abundance /soto е 0.7870) Mg-24 ..L... 0.1013) Mg-25 0.1117) Mg-26 к