Whether the given compositions disprove Proust’s law of constant composition or not. The compound carbon monoxide contains 42.9%, carbon and 57.1% oxygen. The compound carbon dioxide contains 27.3% carbon and 72.7% oxygen. Concept Introduction: The law of constant composition or the law of definite composition sometimes called Proust's law which explains that a chemical compound does not depend on its source and method of preparation but always comprises its component elements in fixed ratio (by mass).

Question

Imagine that you have discovered several stable isotopes of a new element, which you call element X. The measured isotope masses and abundances are given in the table below. Percent Abundance Mass (amu) 353.1165 354.1330 356.3666 Isotope 353X 354X 356X 10.909% 41.304% 47.787% What is the average atomic mass of this new element X? Provide at least 5 significant figures (2 decimal places) in your answer. Show all of your work and calculations in the answer box below. You will not get full credit for this question if you do not show your work. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). R T U f Paragraph ✓ Arial 10pt Y A O

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Question

Chapter 2, Problem 12P

Interpretation Introduction

Interpretation:

Whether the given compositions disprove Proust’s law of constant composition or not.

The compound carbon monoxide contains 42.9%, carbon and 57.1% oxygen. The compound carbon dioxide contains 27.3% carbon and 72.7% oxygen.

Concept Introduction:

The law of constant composition or the law of definite composition sometimes called Proust's law which explains that a chemical compound does not depend on its source and method of preparation but always comprises its component elements in fixed ratio (by mass).

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Imagine that you have discovered several stable isotopes of a new element, which you call element X. The measured isotope masses and abundances are given in the table below. Percent Abundance Mass (amu) 353.1165 354.1330 356.3666 Isotope 353X 354X 356X 10.909% 41.304% 47.787% What is the average atomic mass of this new element X? Provide at least 5 significant figures (2 decimal places) in your answer. Show all of your work and calculations in the answer box below. You will not get full credit for this question if you do not show your work. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). R T U f Paragraph ✓ Arial 10pt Y A O

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