Two samples of different compounds of nitrogen and oxygen have been added to the the following compositions. Show that the compounds follow the law of multiple proportion. What is the ratio of oxygen in the two compounds for a fixed amount of nitrogen. Compound A has 1.206g of nitrogen and 2.755g of oxygen and compound B has 1.651g of nitrogen and 4.714g of oxygen

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8. Concerning the Ions, Molecules, and Compounds, it is INCORRECT to affirm: • Ion is an atom that has a positive or negative charge because it has unequal numbers of protons and electrons. • When two or more atoms share electrons, the resulting combination is called a molecule. • Ionization is the process of losing electrons. • Molecular formula indicates the elements and the number of atoms of each element that make up a molecule.

A sample of Co weighs 77.2 grams. Will a sample of Sn that contains the same number of atoms weigh more or less than 77.2 grams? OA sample of Sn weighs less than 77.2 grams. OA sample of Sn weighs more than 77.2 grams. Calculate the mass of a sample of Sn that contains the same number of atoms. 9 Sn Mass =

Element A has two isotopes. The first isotope is present 19.41% of the time and has a mass of 231.12. The second isotope has a mass of 193.24. Calculate the atomic mass of element A.

A 11.90 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 16.87 grams of Co, and 10.36 grams of H20 are produced. In a separate experiment, the molar mass is found to be 62.07 g/mol. Determine the empirical formula and the molecular formula of the organic compound. Enter the elements in the order C, H, O empirical formula = molecular formula =