General Chemistry

Intro to College Chemistry

26)The value of Z for an atom containing 29 protons, 29 electrons, and 34 neutrons, is 26 ) 7 Diﬀ: 2 Section:2.2, 2.3 32 ) H y d r og e n exi s t s a s t h r ee i s oto p e s . T h e s e i s ot op es d i ff e r b y t h e n u m b e r of con t a 3 i n 2 e ) d i n 8 the atom. A) neutrons B)charges C) electrons D) particles E)protons Answer:A Diﬀ: 2 Section:2. 3 33) Adding one proton to the nucleus of an atom 33) A)

CHEM | 100 | Intro to College Chemistry | assessment | 26)The value of Z for an atom 

30 ) A s oli d s a m p l e a t r oom t e mp e r a t u r e s p on t a n e ou s l y s u b li m e s f or m i n g a g a s . T h i s ch a n g e 3 i 0 n ) s t a t e i s 1 2 accompanied by which of the changes in the sample? A) Entropy and energy increase. B)Entropy increases and energy decreases. C) Entropy decreases and energy increases. D) Entropy and energy decrease. Answer:A Diﬀ: 2 Section:7. 4 31) A p r oce ss w h i ch i

CHEM | 100 | Intro to College Chemistry | assessment | 30 ) A s oli d s a m p l e a t

101 06 PRACTICE Exam CHECK ANSWERS MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the quest 1) Which statement concerning the mole is not correct? 1) A) A m ol e o f a d i a t om i c el e m e n t con t a i n s A 2 m × o N l es of a t om s of t h e e l em e n t . B) The molar mass of any compound is equal to its molecular weight in grams. C) A mole of any com

CHEM | 100 | Intro to College Chemistry | assessment | 101 06 PRACTICE Exam CHECK ANS

3 2 4 10) Which form of radiation is generally considered the most dangerous? 10) A) B) C) D) positron E) all of the above Answer:B Diﬀ: 1 Section:11. 2 11) Radioactivity is generally associated with which part of the atom? 11) A) the entire atom B) electrons C) neutrons D) nucleus E) protons Answer:D Diﬀ: 1 Section:11. 2 12) Which of the following is considered t

CHEM | 100 | Intro to College Chemistry | assessment | 3 2 4 10) Which form of radiat

Name: Jennifer Warren Separang a Mixture of Compounds by Physical Properes: Fraconal Crystallizaon Advance Study Assignment Trey weighed a 150-mL beaker (67.34 g). He then added his unknown sample to the beaker and reweighed it (97.12 g). 1) What was the mass of Trey’s sample? 29.78g Trey weighed a piece of ﬁlter paper (0.34 g) and placed it into the Buc

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