Question

question 1,2

Your Name: Student ID: Show all your work and calculations to receive full credit. 1. (10 pts) Ndeye learned the law of conservation of mass. Balance the following equations. a) _Ticle + NaH → Ti + NaCl + H2 gobelets b) KClO4 + KCl + O2 c) __C12H22011 + 02 CO + H2O d) _FeCl2 + K2SO4 → FeSO4 + _KCI e) __Fe + _H2O + _02 → _ Fe(OH)3 2. Tahri found that the composition of a compound is magnesium 20.20%, sulfur 26.60%, and oxygen 53.20%, by chemical analysis. a) (7 pts) Calculate its empirical formula. Soboto og billow b) (3 pts) If the molecular mass is 120 g/mol, what is its molecular formula?

Answer 1

Caleulate empiical dovmule h 20-20 0: 53.00 26.60 A ASsume 100 the compound is present, changes the peond to am o:53.20 S: 26.60 COnvet the maise moles t0 20.20 Mg: mole 24.30 Male S 26.60 0-831 Mala 32 dImale $3.20 9 3.325 Mole

Oivide the lowet numbes, Seeking the Smallet wholo mumbes Yatio mg: 0.83 0.831 S:o83) 0-831 3.33 4 O 831 wrte the empircal dovmula (E F) mgso4

domula Moleeulas what tnoleulas ma: 12091Mob Calculate the Yatio of moteulal domula maw te by empral domulo E.Pmar 120.3 91 mak Po Moleeulal may G-P May 1203914 l moleulal doumula P1xMaloy horbw

Balane the dollauing eat Ans Ti + 4Nalt 2 Ticly tNaH +or 0K clou D Ku (by L tho 12 cat 220) t 12 Fesoyt 2 kd ks0y Fed2 t 4Fe t Fe o)3 empirital domula caleulate 0S3.00 26.60 A 20-20 ASsume 100 f the compound s present