16 the m, you iave 30 minutes to upload your work on Canvas. Question 14 A student determines the molar mass of a compound to be 145g/mol. If the theoretical value is 162g/mol, what is the percent error? O 11.7% O 9.25% O 10.5% O 8.14% * Previous Nex No new data to save. Last checked at 12:33pm Subm

A sample of a gaseous binary compound of boron and fluorine weighing 0.794 g is decomposed to give 0.176 g of solid B. In a separate experiment, the molar mass of the compound is determined to be 97.6 g/mol. Determine the molecular formula of the compound. Submit Answer Use the References to access important values if needed for this question. Try Another Version 5 item attempts remaining Enter B before F.

Part D Calculate the moles of C2 H6 in 3.76x1023 molecules of C2 H6. Express your answer using three significant figures. moles of C2 H6 Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Provide Feedback < Previous

Done 9 of 29 Question 7 An empirical formula atways indicates the simplest whole-number ratio of different atoms in a compound. True F False E Feedback

7.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 152. g/mol, is burned completely in excess oxygen, and the mass of the products carefully measured: product mass carbon dioxide 10.86 g water 5.33 g Use this information to find the molecular formula of X. Ar Check Explanation Privacy Terms of Use O 2019 McGraw-Hill Education. All Rights Reserved. 4:37 PM 12/5/2019 99+ OType here to search hp end home ins prt sc delete f12 f11 f10 f9 f8 f6 10 f5 f3 f2 num lock backspace esc 8.

Question 79 The molecular weight of cholesterol is 386.65 g/mole. What is the mass of one molecule of cholesterol? (- For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

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Results table. To clean up, zoom out from the balance and drag the sample to the red disposal container. Repeat with ammonium chloride (NH4Cl), located on the Salts shelf.                                     C12H22O11                                              NH4ClMass (g)                        1.0481 g                                                  1.0444g  Molar Mass (g/mol)MolesMoles of each elementAtoms of each element Much like the previous calculation, you will use the periodic table to determine the molar massof the compound. The example shown is for sodium chloride, NaCl. The molar mass is the massof 1 sodium (22.98g/mole) and 1 chlorine (35.45g/mole) added together, 58.43g/mole. If theformula shows multiple atoms, as in sugar, you must take that into account. For sugar, it will be12 times the mass of a carbon atom plus 22 time the mass of hydrogen atom, plus 11 times themass of oxygen atoms.The calculation of moles will be similar to that done in the previous…

Answer to #1 percent comp = 2.12% Answer to #2 39.94% water in the unknown

CHEM 120 Spring 2022 uquiz 3 February 7-10 1. Calculate the number of moles AND the mass in grams of a sample of Neon containing 2.790 X 1025 atoms of Neon. Note: this number of Ne atoms is NOT a number obtained by Name counting (i.e. you must consider the number of significant digits in this number for your final answer) Neon is 20.18 g/mol Avogadro's number 6.022 X 1023 You must show your work to receive credit. 20.18g/mol 6,.08M 10 49 2.790x10 6.022x 10* 1.68038x10