A compound has the following composition: 48.0% carbon, 4 0% Determine 12 8% sul

Question

A compound has the following composition: 48.0% carbon, 4 0% Determine 12 8% sulfur and 12 8% oxygen The molecular mass is found to be 250. amu Determine the molecular formula for the compound. Calculate the number of grams of barium phosphate that could be produced y 50.8 g of barium chloride with excess sodium phosphate 3 BaCl_2 (aq) + 2N_a3PO4(aq) rightarrow 6 NaCl (aq) + B_a3 (PO_4)_2(s) Calcium carbonate is formed when calcium oxide combines with CO_2. CaO(s) + CO_2(g) rightarrow CaCO_3(s) , Calculate the grams of calcium carbonate that could be formed from the reaction o g of calcium oxide with 12.0 grams of carbon dioxide. If 15.3 g of calcium carbonate are actually formed, what is the percent yield? A commercial method of manufacturing hydrogen involves the reaction of iron and steam. How many moles of H_2 can be produced from 42.7 g Fe and an excess of H_2O (g) 9 How many grams of H_2O are consumed in the conversions of 63.5 g Fe to Fe_3O_4? If 7.36 mol H_2(g) is produced, how many grams of Fe_3O_4 must also be produced?

Explanation / Answer

14)

48 C

4H

22.4 N

12.8 S

12.8 O

MW = 250

find mass:

assume a basis of 250 g

then

48 C -- > 0.48*250 = 120 g of C

mol of C = mass/MW = 120/12 = 10 mol of C

4H-- > 0.04*250 = 10 g of H

mol of H = 10/1 = 10 mol of H

22.4 N --> 0.224*250 = 56 g of N

mol = mass/MW = 56/14 = 4 mol of N

12.8 S --> 0.128*250 = 32 g of S

mol = masS/MW = 32/32 = 1 mol of S

12.8 O --> 0.128*250 = 32 g o fO

mol = mass/MW = 32/16 = 2 mol of O

then

C10H10N4S1O2

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