Number of elements present in longest period View Solution Number of elements present in the shortest period. View Solution Write the names of the elements present in the following compounds. (a) Common salt (b) Ammonia (c) Sulphuric acid (d) Glucose ...
A catalyst for the synthesis of ammonia consists of a double cyanide of an alkali or alkaline earth metal and a heavy metal which has been heated in ammonia gas. A support for the catalyst, e.g. pumice, may be employed; the heavy metal present is preferably chromium, iron or manganese....
(a) water, H2O (b) ammonia, NH3 (c) methane, CH4 (d) ethane, C2H6 (e) more than one of the preceding Which chemical element make up the majority of living biological matter? Carbon is the fourth most abundant chemical element in the universe. What are some of ...
___Ammonia(NH3)___Salt(NaCl)___Energy___Gold(Au) ___Wood___Bronze___Ink___Pizza ___DryIce(CO2)___BakingSoda(NaHCO3)___Titanium(Ti)___Concrete Part3:Matcheachdiagramwithitscorrectdescription.Diagramswillbeused once. A B C D E ...
Why does ammonia, when mixed with Ni^{2+}(aq) or Ni(OH)_2(s), produce a violet colored solution? Explain using scientific reasoning. Explain why spectra of solutions in the ultraviolet and visible regions tend to consist of a few broad ...
in vitamin Bl2, a compound that acts as a catalyst in the metabolism of carbohydrates, fats and proteins. Molybdenum and iron together with sulphur form the reactive portion of nitrogenase, a biological catalyst used by nitrogen fixing organisms to convert atmospheric nitrogen into ammonia. Copper ...
Examples of substances that exist as molecules :- Hydrogen gas (H 2 ) Oxygen gas (O 2 ) Chlorine gas (Cl 2 ) Examples of substances that exist as molecules :- Carbon dioxide gas(CO 2 ) Water(H 2 O) Ammonia gas (NH 3 ) Methane gas(CH 4 ) These are COMPOUNDS ! Elements •...
The levels of ammonia (3.52–4.39 mg/L) and nitrite (0.110–0.294 mg/L) in all the tested sites were greater than the EU Directive 236/98 maximum suggested limits of 0.05 and 0.10 mg/L, respectively (Do Ambiente, 1998). However, the levels in all the tested samples were within the ...
The presenttudy wasimedo determineheoncentrationsfd,o,r,u,e,n, Ni, Pbnd Zn with ICP-AES inheinger nailsfheale (n=68)ndemale (n=52)ubjectsromrbannduralreas inndroundysoreorindingheir exposure profilesnd influencef various personalharactersn element levels.heesultshowedhatheuralubjectsadigher...
simpler substances by chemical means. Elements are the substances that are listed in the periodic table and are the building blocks for everything on earth. Each element has a unique atomic number. The atomic number is the number of protons present in the nucleus of each...