# Problem: The nitrogen in sodium nitrate and in ammonium sulfate is available to plants as fertilizer. Which is the more economical source of nitrogen, a fertilizer containing 30.0% sodium nitrate by weight and costing $9.00 per 100 lb or one containing 20.0% ammonium sulfate by weight and costing$8.10 per 100 lb.

###### FREE Expert Solution

sodium nitrate → NaNO3 → MM is 84.99 g/mol

ammonium sulfate → (NH4)3SO4 → MM is 150.18 g/mol

Calculating the amount of N per $. For NaNO3: 92% (243 ratings) ###### Problem Details The nitrogen in sodium nitrate and in ammonium sulfate is available to plants as fertilizer. Which is the more economical source of nitrogen, a fertilizer containing 30.0% sodium nitrate by weight and costing$9.00 per 100 lb or one containing 20.0% ammonium sulfate by weight and costing \$8.10 per 100 lb.

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Based on our data, we think this problem is relevant for Professor Kahvand's class at City Colleges of Chicago-Richard J Daley College.