Q3 Incomplete combustion takes place when a fuel burns in insufficient oxygen
How the reaction equation is balanced depends on the amount of oxygen present.
Ibrahim is investigating the incomplete combustion of the hydrocarbon butane, CHO
He burns 2.9 g of butane in oxygen. Carbon, carbon monoxide and water are produced.
Ibrahim suggests the following reaction equation:
CH. + 30, → 3C + CO + 5H, O
The reaction produced 4.2 g of carbon monoxide.
Is Ibrahim's suggested equation correct? Explain your answer.
Relative atomic masses (A.): C = 12, H = 1, 0 = 16

Explanation:

high-efficiency after-treatment technology has been required to meet the increasingly stringent regulations on the emissions of nitrogen oxides (NOx), hydrocarbons (HCs), and carbon monoxide (CO) exhausts from diesel engine vehicles throughout the world. The diesel oxidation catalyst (DOC) is an indispensable part of a diesel-fueled exhaust system, which mainly functions in the oxidation of unburned HCs and CO to CO2 and H2O (in the case of HCs) and a proportion of NO to NO2. However, the DOC will unavoidably be poisoned by trace gaseous SO2 or accumulated sulfur on the catalyst under real operational conditions and hence impair the overall purification efficiency of the aftertreatment system. There have been significant research efforts from both academia and industry involving sulfur-relevant diesel oxidation chemistry and development of robust sulfur-resistant oxidation catalysts. This Review focuses on recent advances in the study of SO2 effects on the catalytic oxidation of NO, HCs, and CO over DOCs, with particular attention to the fundamentals beneath apparent observations of sulfur influence on PGM-based and non-noble metal-based catalysts in the different oxidation reactions. Regeneration methods and design rationale for sulfur-resistant catalysts are also covered. Several challenges in the future research regarding microscopic insights into the SO2-influencing mechanism and next-generation sulfur-resistant DOC design are highlighted toward real-world practice.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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it means there are 3 atoms of oxygen