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QUESTION 15 A compound of the empirical formula CH₂O is found to have a molar mass of 120 amu. What is the molecular formula? OA C₂H402 OB. C3H303 OCC4H804 OD.C6H1206 OE not enough information QUESTION 16 How many atoms of chromium are in 6.18g of K2Cr207 (MW 294.19)? Give the answer in scientific notation, to the correct number of significant figures, eg. 4.25e22 MacBook Air

QUESTION 15 A compound of the empirical formula CH₂O is found to have a molar mass of 120 amu. What is the molecular formula? OA C₂H402 OB. C3H303 OCC4H804 OD.C6H1206 OE not enough information QUESTION 16 How many atoms of chromium are in 6.18g of K2Cr207 (MW 294.19)? Give the answer in scientific notation, to the correct number of significant figures, eg. 4.25e22 MacBook Air

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Question 15** A compound of the empirical formula CH\(_2\)O is found to have a molar mass of 120 amu. What is the molecular formula? - A. C\(_2\)H\(_4\)O\(_2\) - B. C\(_3\)H\(_6\)O\(_3\) - C. C\(_4\)H\(_8\)O\(_4\) - D. C\(_6\)H\(_{12}\)O\(_6\) - E. Not enough information --- **Question 16** How many atoms of chromium are in 6.18 g of K\(_2\)Cr\(_2\)O\(_7\) (MW 294.19)? Give the answer in scientific notation, to the correct number of significant figures, e.g. 4.25e22.
Transcribed Image Text:**Question 15** A compound of the empirical formula CH\(_2\)O is found to have a molar mass of 120 amu. What is the molecular formula? - A. C\(_2\)H\(_4\)O\(_2\) - B. C\(_3\)H\(_6\)O\(_3\) - C. C\(_4\)H\(_8\)O\(_4\) - D. C\(_6\)H\(_{12}\)O\(_6\) - E. Not enough information --- **Question 16** How many atoms of chromium are in 6.18 g of K\(_2\)Cr\(_2\)O\(_7\) (MW 294.19)? Give the answer in scientific notation, to the correct number of significant figures, e.g. 4.25e22.
Expert Solution
Step 1

To determine the empirical formula: 

First we will calculate the mass of empirical formula .

The molar mass is given to us .

After this we will divide molar mass to empirical mass .

After that we will multiply the result with empirical formula to get the molecular formula of compound . 

 

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