Chemistry
If a crop of wheat removes 20 kg of nitrogen per hectare of soil, what mass in kg. of the fertilizer calcium nitrate would be required to replace the nitrogen in a 10 hectare field.
[N = 14 ; O = 16 ; Ca = 40]
Related Questions
What is the mass of nitrogen in 1000 kg of urea [CO(NH2)2].
[C = 12] (Answer to the nearest kg.)
Calculate the % of boron [B] in borax Na2B4O7.10H2O.
[H = 1, B = 11, O = 16, Na = 23]
Calculate the percentage of phosphorus in the fertilizer superphosphate Ca(H2PO4)2. (correct to 1 dp)
[H = 1 ; O = 16 ; P = 31 ; Ca = 40]
Calculate the percentage of platinum in ammonium chloroplatinate (NH4)2 PtCl6
(Give your answer correct to the nearest whole number.
[N = 14, H = 1, Cl = 35.5, Pt = 195]