The ratio between carbon and oxygen is 1:2.The elements present in this compound are carbon and oxygen. What is the chemical formula for each of the reactants? Therefore, the empirical formula is C 4 H 8 O. The gas oxygen that is in the "air" has the formula O 2. That means that there are two atoms of oxygen. The chemical formula of it is CO2. If we start with: [math]CO^- + O_2 -> CO_2[/math] The balanced equation will be: [math]2CO^- + O_2 -> 2CO_2[/math] Step 4: Write the number of of carbon atoms into the skeleton molecular formula as a subscript number to the right of the symbol for carbon (C). However, based on the studies, molecular oxygen â¦ Step 3: Count the number of carbon atoms in the alkanone molecule. The resultant mixture contained 2 volumes of water vapour and 2 volumes of carbon dioxide. We can write an equation for this reaction: The plus sign indicates that carbon and oxygen react, and the arrow, usually read as âyields,â points to the result of their reaction: carbon â¦ So one mole of O 2 weights : 2 x 16 = 32 grams The atomic mass of carbon is 12 grams per mole. â The mass of zinc = 52 gm â The mass of carbon = 9.6 gm â The mass of oxygen = 38.4 gm - No of moles of Zinc = 52/65 = 0.8 - No of moles of Carbon = 9.6/12 = 0.8 - No of moles of oxygen = 38.4/16 = 2.4 â Zn : C : O = 0.8 : 0.8 : 2.4 C H O . The formula for carbon dioxide is CO 2, that means one atom of carbon and two atoms of oxygen. The oxygen:carbon ratio is 1.018, or approximately 1, and the hydrogen:carbon ratio is approximately 2. Determine the formula of the compound. One volume of a compound of carbon, hydrogen and oxygen was exploded with 2. A. C2 and O B. C2 and O2 C. C and O2 D. CO2 and O2 Carbon dioxide is made of carbon and oxygen atoms. For the reaction of carbon with a plentiful source of oxygen, as we have noted, the sole product is carbon dioxide. Step 4: We can write the empirical formula by placing the numbers as the subscript to the elementâs symbols. Thus, the mole ratio of carbon to oxygen and hydrogen to oxygen is 4 : 1 and 8 : 1. Oxygen is necessary in sustaining life and considered as a precious gem since it cannot be found in space. The empirical formula of glucose is therefore CH 2 O, but what is its molecular formula? Step 2: Write a skeleton molecular formula using the symbols for carbon (C), hydrogen (H) and oxygen (O). 5 volumes of oxygen. Carbon and oxygen bond to form carbon dioxide. Chemistry The Mole Concept Percent Composition 1 Answer Calculation: - Let the mass of the compound be 100 gm. The empirical formula of the given compound. Whatâs the empirical formula of a molecule containing 18.7% lithium, 16.3% carbon, and 65.0% oxygen? Oxygen has an atomic mass of 16 gram per mole. 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