Question

[12) 36. Calculate the mass, in grams, of a sample containing 0.275 mol of irontInitrate [9]37. Dimethylamine contains 53.2% C, 15.7%H, and 31.1% N. Determine its empirical formula. [14] 38. Predict the products and write a balanced equation for the following double displacement reactions b) K2S HCI [12) 39. Calculate mass of carbon, in grams, that reacts completely with 14.8 grams of Sio according to the equation SiO2(s) + 3C(s)-. Sicis) + 2CO(g)

Answer 1

hndl Prass Felvos)moles x Moles mass 10-275 m01k( 1803/rmel) つ 44.5 et s lahe 10o Cample Dmefhyl amine 53. 2X (b0 53.2 100 molas mas d ls bon12ms moles cu casbon = mass 572 ,433 hel Molsmass 124Inol dhogen 15 o moles wibogen 312221 mel Moles Cos bon -4-433 mol 2 moles4withogen 1,221 mol 2 221 mo moles g wihagen 221 mol 2 22 mol

Dete Page No mbjhes om hy de mide Sodium Sulphare. bassim cHenide hydhos en Swlphide moles Si0 mass 14- proms molas mass O 246t moles Cas bon = 3 x moles 4-S102 3 x 0 2467 moles moles 4 Casbo 0-74 mele In o lar masslasben 121 /mol mets oh carbon moles x molas mas s massa las bon 8-883