<span>7.75% nitrogen in the sample.
The balanced reaction of HCl and NH3 is
HCl + NH3 = NH4Cl
Which means that 1 mole of HCl will neutralize 1 mole of HN3.
Since we used 83.0 ml of 0.150 m HCl, that means that we used
0.083 l * 0.150 mol/l = 0.01245 mol
So we had 0.01245 mol of NH3 which means that we had 0.01245 mol of N
Looking up the atomic weight of nitrogen, we get 14.0067. So
0.01245 * 14.0067 = 0.174383415 g
We now know that the sample had 0.17438 g of nitrogen. Divide by the original mass of the sample, getting
0.17438 / 2.25 = 0.077502222 = 7.7502222%
Rounding the result to 3 significant figures, gives us a mass percentage of 7.75% nitrogen in the original sample.</span>
32.73 g phosphorus
42.27 g oxygen.
= 74 .99 substance
Solubility of a gas in a liquid is directly proportional to the partial pressure of that gas above the liquid. Solubility of a gas is inversely proportional to temperature.
So, the solubility of carbon dioxide gas in water is increased by increasing the partial pressure of carbon dioxide and by decreasing the temperature.
Answer:
Fatty acids have an even number of carbons because they are synthesized from a starting material (acetyl-CoACoA) that has an even number of carbons.
Explanation:
Fatty acids are carboxylic acids and are known to have even number of carbon atoms because they are synthesized from a 2 carbon atom acetyl Co-A molecules which are assembled together. It contains a carboxylate group covalently joined with an hydrophobic head of CH3-(CH2)n and may have an unsatireated CH=CH group within its CH2 chain. The synthesis of fatty acids from acetyly Co-A involves the activation reaction of an enzyme acetyl Co-A synthetase with an acid. It involves dehydrogebation, hydration, oxidation and thiolysis. Fatty acids vary in length of its chain, the number of carbon-carbon double bonds attached to its CH2 chain nd also the location of those double bonds in the carbon chain. Saturated fatty acids are those without carbon-carbon double bond in its chain while unsaturated have carbon- carbon double bonds. Monounsaturated fatty acids have one carbon-carbon double bonds and polyunsaturated fatty acids have two or more carbon-carbon double bonds.
Nitrogen cycle is the series of processess where nitrogen and its compound move through the environment and in living organisms. The processes here include fixation, ammonification, nitrification and denitrification. Majority of Earth's atmosphere is nitrogen.