chem 110 handout 2

chem 110 handout 2 - Week 1 Lectures 1-3 QUEST ION 1 What...

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Unformatted text preview: Week 1 Lectures 1-3 QUEST ION 1 What is the symbol for the atom that has 9 protons, 10 neutrons and 9 electrons? QUEST ION 2 If a nucleus were the siz e of a golf ball (diameter = 4.3 cm) what is the diameter of the atom with a nucleus this siz e? (Give your answer in meters.) QUEST ION 3 A pure sample of 238 U weighs 238.0 g. What is its mass in amu? QUEST ION 4 Ga lliu m h a s o n ly two iso to p e s: Ga a n d Ga . Wh a t is th e a b u n d a n ce o f Ga ? A. 2 4 .8 % B. 36 .1% C. 6 3.9 % D. 7 5 .2 % E. Th e re is n o t e n o u g h in fo rma tio n to a n swe r th is q u e stio n . QUEST ION 5 Th e symb o l fo r o n e o f th e sta b le iso to p e s o f su lfu r ca n b e writte n : S. Ho w ma n y p ro to n s, n e u tro n s a n d e le ctro n s a re in th is iso to p e ? QUEST ION 6 Ch lo rin e e xists p rima rily a s Cl a n d Cl a n d h a s a n a ve ra g e a to mic we ig h t o f 35 .4 5 3. Th e a b u n d a n ce o f Cl with a to mic we ig h t o f 35 is A. 2 3% B. 9 1% C. 7 7 % D. 4 5 % E. No n e o f th e a b o ve is with in 10 % o f th e co rre ct a n swe r QUEST ION 7 A student weighs 20 M&Ms and finds that the average weight of a single M&M is 0.8695 g. How many M&Ms are in a 1 lb (453.6 g) bag of M&Ms? QUEST ION 8 I. Ho w ma n y a to ms a re in a mo le o f Al O ? II. Wh a t is th e ma ss o f a mo le o f Al O ? QUEST ION 9 How many carbon atoms are in 3.2 moles of graphite (a solid form of carbon)?...
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chem 110 handout 2 - Week 1 Lectures 1-3 QUEST ION 1 What...

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