what is the molecular formula for this compound?
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Molecular formulas give the kind and number of atoms of each element present in a molecular compound. In many cases, the molecular formula is the same as the empirical formula. The molecular formula of methane is CH4 and because it contains only one carbon atom, that is also its empirical formula.
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The empirical formula of a compound is the simplest whole number ratio of atoms of each element in the compound. It is determined using data from experiments and therefore empirical. For example, the molecular formula of glucose is C 6H 12O 6 but the empirical formula is CH 2O.
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The empirical formula is C₃H₃O. Assume we have 100 g of the compound. Then we have 65.5 g of C, 5.5 g of H, and 29.0 g of O. The empirical formula is C₃H₃O.
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Its chemical formula is Na2CO3. (ii) Ten molecules of water of crystallisation (i.e.10H2O) are present in this compound.
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In chemistry, the empirical formula of a chemical compound is the simplest positive integer ratio of atoms present in a compound. A simple example of this concept is that the empirical formula of hydrogen peroxide, or H2O2, would simply be HO.
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You already know that molar mass of the compound is 84, so to find the ratio of the compound to CH2, divide 84 by 14, and you will get 6. Since you got 6, you need to multiply each element in CH2 by 6, giving you a molecular formula of C6H12.
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The empirical formula of a compound is the simplest whole number ratio of atoms of each element in the compound. ... For example, the molecular formula of glucose is C 6H 12O 6 but the empirical formula is CH 2O. This is because we can divide each number in C 6H 12O 6 by 6 to make a simpler whole number ratio.
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These are the diatomic elements (H2, N2, O2, F2, Cl2, Br2, I2), sulfur (S8) and phosphorus (P4). The empirical formula states the simplest ratios of all the elements in the compound. For example, ethane has molecular formula C2H6 but its empirical formula is CH3.
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The composition of the unit cell is therefore Na4Cl4. Since the number of formula units per unit cell is 4, the formula of the compound is NaCl. For compounds in which the building blocks of the crystal structure are molecules, the procedure is essentially the same.
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The simplest ketone is CH₃—C(=O)—CH₃. Its molecular formula is C₃H₆O. From this formula we can say that for “n” carbon atoms we need “2n” hydrogen atoms and an oxygen atom. Hence general formula of ketone is CnH₂nO.
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We are given that the element Z has a valency of 3. The oxide ion is denoted by O2- and has a valency of 2. So in order to find the chemical formula of the compound, we will cross over the valencies of the two combining atoms. Thus the chemical formula of the substance will be ZO.
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['Use the chemical formula to determine the number of each type of atom present in the compound.', 'Multiply the atomic weight (from the periodic table) of each element by the number of atoms of that element present in the compound.']
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Answer and Explanation: The empirical formula for magnesium chloride is MgCl2 .
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What is the empirical formula of a compound that is 14 g calcium, 11 g oxygen, and 0.7 g hydrogen? A. Ca2OH2.
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Answer and Explanation: The empirical formula for P4 O6 is P2 O3. The given formula is a molecular formula because the subscripts can be reduced.
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Divide the molar mass of the compound by the empirical formula molar mass. The result should be a whole number or very close to a whole number. Multiply all the subscripts in the empirical formula by the whole number found in step 2. The result is the molecular formula.
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Ammonia's molecular formula is NH3. Its molar mass is 17.0306g.