Question

gnesium is in 5.6 gram of Mg(OH)?? no (olt272"0" Melar mats 58132 5.6682x10) almol -58.32g Imol adoms grams of oxyger 179.2 79 3,079 5. Find the empirical formula of a compound with the following composition: Hg 80.69% S 6.436% 0 12.87% 6- How many atoms are in 35 gram of K3PO3?

Answer 1

5) If sum of the percentages of all the elements is equal to 100%. then their percentages are equal to their maises. Simple ratio : moles of Hg = 80.69 0.4022 > 0.402222 23. 2006 . 0. 2004 moles of S = 61436 +0.2004 = 0.2004 0.2004 1 32.1 ma moles of 0 = 12.87 (2.87 0.8044 - = Orison 0.8044 4 o. 2004 empérical formula of compound = H9,5OH 23 6) mars of K3PO3 = 359 (moarmaus of K3 PO, = 196.3 g/mol ) moles of ky pes 0:178 mndes 1 mole of K3 PO3 contains tx 6.023x10 atoms 0.178 moles of ks Po, contains -> 7x61023x10^30.178 → 7.5 x103 atomas K3PO3 contains a t atoms (Three k + one's't Three o)