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practiveexam4 - 1 Chemistry Department of the City College...

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Unformatted text preview: 1 Chemistry Department of the City College of New York Chemistry 103.1 E, BZn-li‘iJ-st Examination-—0ctober 5,1998 Name {last name first]: _, ._ ID. Number: __ __ _ .. ___ Workshop Leaflet-z. ___—'— ___— the correct number of significant figure-.5. . (9} a. An ion is formed when a phosphoruefl atom gains three eieetrons. How many protons: electrons, and [lElltl'DllS are in the ion'? Protons: )5 Electrons: I3 Neutrons: I? (-5) .b. Write the formula. and physical state (solid, liquid, or gas} at 25°C for each of the following elements. --------------- gigging-_-.-_---—.-.—.-.—.-.—.-.—.--—---Foi=mu_l.a--—--—-_--—.-—.-—.-—.-—.-—.-—--—-HESiflflJ—iii-LEN:_-.-_-.-_-.-_-.-_-.-_---—.--—---—---—---—---—,--—-- Chlorine (I; grey Potassium K solid {4) e. What is the formula ot‘alnminum phosphate? AH’Q; [4]: d. What is the name ot‘Nz-Us? Dozin‘ogen pentoxide [4] e. Liquid nitrogen boils ail—195°C. is this process a physical change or is it a ehemiooi change? A physical change on CEBWMWflEflLflO—bkms—te— ...
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