midterm exam of ch 1,2,6, Exams of Chemistry

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Ne CHEM 100 Prctice Mighertn I PART 1; Answers to all questions in Part | must appear in the space provided. Where applicable, answers must be shown to the correct number of significant figures, 1. Give the name of the following groups of the Periodic Table: Group 1: _AtKat Metals Group 18: Nodbtc Goces 2. Indicate how many significant figures there are in each of the following numbers: 0.00356 3 20,870 Ly 3. Complete the following calculation and give the answer, rounded to the correct number of significant figures and with the correct units, [(6.432 x10” g/mL) + (2.341 x 10° g/L )] x (3.8560 x 10° L) wo 4 Zap | u32X i 2x tuna) +(2-34) Xx \e aly] x 3 :S560%\o L we TL “14 Son)) 43» 8 S6OX\9 Op [ (ens 2 Kin? @) + VBurxKlo = . \ L _ 20609L* - Gxsisui tic dyy KB eSb0 01%) « Ag Bh 7° Ss dps 4st S s¢ = wUusqX io Fe 4. A piece of aluminum has a mass of 10.82 kg. The density of aluminum is 2.70 g/cm’. What is the volume of the piece of aluminum? Volumes Mase peng (ty W4s 3 = \0: 82X10 & sousemee oe 3 sg9 B10 G Lom a 3 - 4Y.ooTHo Kia om = 40 R19% enw? 5, Give the formula for the ionic compounds that will form from the following combinations of ions: Na’ and S* N % $ Ca”* and N* C4 ans 6) CamScanner a 7)