# Chemistry

posted by .

A farmer applies 1400.0 kg of a fertilizer that contains 10.0% nitrogen to his fields each year. fifteen (15.0%) percent of the fertilizer washes into a river that runs through the farm.
If the river flows at an average rate of 0.410 cubic feet per second, what is the additional concentration of nitrogen ( expressed in milligrams of nitrogen per liter) in the river water due to the farmer's fertilizer?

• Chemistry -

1. Determine the mass of nitrogen that washes into the river each year, in milligrams.
( Multiply the mass of fertilizer by both percentages. )

2. Determine the volume of river that flows through the farm each year, in litres.
( Convert cubic feet to litres, multiply by the number of seconds in a year. )

3. Divide and conquer.

• Chemistry -

I know that. I already used these steps, but the answer was wrong.

• Chemistry -

1: 1400.0 * 10^6 * 0.100 * 0.150 = 2.10E7 mg

2: 0.410 * 28.32 * 3.154E7 = 3.66E8 L

3: 0.574 mg/L

• Chemistry -

I'm so sorry for bothering you, but the answer still wrong. It says that this is similar to the amount of fertilizer in the river water, but the amount of nitrogen will be less. So, what percent of the total mass of the fertilizer is nitrogen?

Thanks,

## Similar Questions

1. ### math

I'm not sure of how to solve word problems. The question is,"One lawn fertilizer is 24% nitrogen and another is 12% nitrogen. How much of fertilizer should be mixed to obtain 100 kg of fertilizer that is 21% nitrogen?
2. ### math

I'm not sure of how to solve word problems. The question is,"One lawn fertilizer is 24% nitrogen and another is 12% nitrogen. How much of fertilizer should be mixed to obtain 100 kg of fertilizer that is 21% nitrogen?
3. ### College chemistry

A farmer applies 13.50 kg of a fertilizer that contains 10.0% nitrogen to his fields each year. Fifteen (15.0%) percent of the fertilizer washes into a river that runs through the farm. If the river flows at an average rate of 0.265 …
4. ### CHEMISTRY

A garden fertilizer contains 15% by mass of nitrogen. The recommended usage is 30g of fertilizer per 10dm^3 of water. What is the concentration of nitrogen in this solution?
5. ### CHEMISTRY

A lawn fertilizer is rated as 6.50% nitrogen, meaning 6.50 g of N in 100 g of fertilizer. The nitrogen is present in the form of urea, (NH2)2CO. How many grams of urea are present in 100 g of the fertilizer to supply the rated amount …
6. ### math

SHURGRO fertilizer contains 18% ammonia plus carbon compounds.If 80% of the ammonia contains the chemical element nitrogen, what percent of this fertilizer is nitrogen?
7. ### Chemistry

14) A lawn fertilizer is rated as 7.04% nitrogen, meaning 7.04 g of N in 100 g of fertilizer. The nitrogen is present in the form of urea, (NH2)2CO. How many grams of urea are present in 100 g of the fertilizer to supply the rated …
8. ### Chemistry

A farmer supplies 1250.0 kg of a fertilizer that contains 10& nitrogen to his fields each year. Fifteen percent of the fertilizer washes into a river that runs through the farm. If the river flows at an average rate of 0.165 cubic …