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20. Draw a concept map to relate the following terms: molar mass of an element, molar...
Compound X has a molar mass of 283.89 g.mol and the following composition: element mass % phosphorus 43.64% oxygen 56.36% Write the molecular formula of X.
Compound X has a molar mass of 180.16 g-mol and the following composition: element mass % carbon 40.00% hydrogen 6.71% oxygen 53.29% Write the molecular formula of X. Х ?
Compound X has a molar mass of 134.13·gmol−1 and the following composition: element mass % carbon 44.77% hydrogen 7.52% oxygen 47.71% Write the molecular formula of X .
-1 Compound X has a molar mass of 86.09 g-mol and the following composition: element mass % carbon 55.81% hydrogen 7.02% oxygen 37.17% Write the molecular formula of X. 5 ?
7 A compound having an approximate molar mass of 165-170g has the following percentage composition by mass: carbon, 42.87%; hydrogen, 3.598%, oxygen, 28.55%, nitrogen 25.00%. Determine the empirical and molecular formulas of the compound. A compound consists of carbon and hydrogen. The molar mass of this compound id 44.1 g/mol The percent by mass of carbon is 81.71%. Determine the empirical and molecular formulas of the compound 8.
Compound X'has a molar mass of 579.43 g mol and the following element | mass % phosphorus 26.73% nitrogen | 12.09% chlorine 61. 1896 Write the molecular formula of X
Problem 1. Determine the percent composition by mass of each element in C,H.02 71802 Problem 2. A particular compound is composed of 31.06 grams Zn, 4.79 grams H, 26.61 grams N, and 30.46 grams S. The compound has an actual molar mass of 586.85 g/mol. Determine both the empirical and molecular formula Problem 3. Using the following unbalanced equation, 16.8 grams of H2S will make how many grams of Cr2S3? Cr203 + H2S Cr2s, + H2O Problem 4. A 5.53...
Chem 101 Study Guide for Chapter 3 Selected practice problems from the end of each chapter are recommended; these problems are listed in parentheses in the appropriate section. It's great to do more than those listed. Chapter 3: Stoichiometry (Questions: 25, 29, 33, 35, 39, 47, 51, 53, 55, 57, 59, 61, 65, 67, 73, 75, 79, 83, 87, 95, 99, 105) 3.1 Counting by Weighing 3.2 Atomic Masses What is an atomic mass, and how is it related to...
1). Determine the thickness of a piece of platinum foil that has a mass of 2.000 g, and has length and width of 9.85 cm and 5.20 cm, respectively. Note that the density of platinum is 21.45 g/cm3 . 2). A 100.06-g piece of tungsten metal is dropped into a graduated cylinder containing water. If the water level in the graduated cylinder is observed to increase from 14.5 mL to 19.7 mL, what is the density of tungsten? 3.) What...
please complete the questions has not answering with clarification of the answer to any page Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...