q1w2.101 - correct number of significant figures . Report...

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Dr. Zellmer Chemistry 101 Wednesday 10:30 AM Time: 23 mins Summer Quarter 2008 June 25, 2008 Quiz I Name Rec. Instr. ---------------------------------------------------------------------------------------------------------------------------------------- Show ALL your work to receive full credit. 1. (5 pts) Give the names, correctly spelled, for the elements whose symbols are given below: a) Mn b) Fe c) B d) Cl e) Ni 2. (5 pts) Give the symbols, correctly written, for the elements which are named below: a) chromium b) potassium c) copper d) helium e) magnesium 3. (3 pts) Ethane can decompose to give carbon and hydrogen. Write a word equation for the reaction AND label the reactants and products . 4. (2 pts) Report the following numbers to indicated number of significant figures . a) 1020000 (to 4 sig. figs.) b) 3.03450 (to 4 sig. figs.) OVER . ..
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5. (8 pts) Perform the following mathematical operations for parts (a) and (b) and report your answer to the
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Unformatted text preview: correct number of significant figures . Report all your answers in scientific notation . Include units where appropriate. a) (3.5 pts) 8.0065 x 10 ft + 7.715 x 10 ft =-3-3 b) (4.5 pts) (5.100 cm ) (55.76 g - 48.0135 g) 2 ))))))))))))))))))))))))))) = 3.5021 x 10 s-3 6. (2 pts) I have a bottle of Italian salad dressing. Is salad dressing a homogeneous mixture, heterogeneous mixture or a pure substance? 7. (5 pts) Ice is melting in a cup (solid going to liquid). Answer the following. The process of melting is a change. physical or chemical (circle one) The process of melting heat energy the surroundings. (Be careful.) absorbs, from or releases, to (Circle one) The process of melting is endothermic or exothermic (Circle one)...
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q1w2.101 - correct number of significant figures . Report...

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