General Chemistry Questions

TrueFalseQuestion at position 22 2 points Question 2 is unpinned. Click to pin. Question at position 2 What is the molar mass of water, H2O?What is the molar mass of water, H2O?Answer not shown18 g/mol26 g/mol3 g/molQuestion at position 33 2 points Question 3 is unpinned. Click to pin. Question at position 3 What is the molar mass of water, CO2?What is the molar mass of water, CO2?18 g/molAnswer not shown26 g/mol44 g/molQuestion at position 44 4 points Question 4 is unpinned. Click to pin. Question at position 4 Please select all values that equal to 1 mol (select all that apply)Please select all values that equal to 1 mol (select all that apply)44 grams of CO212.044 * 1023 atoms of oxygen in a sample of oxygen gas6.022 * 1023 molecules of water18 grams of H2OQuestion at position 55 4 points Question 5 is unpinned. Click to pin. Question at position 5 Find the mass, in grams of H2O, of 0.1372 moles of H2OPlease type just the number in standard notation with the correct# of SF’s without the unit below. Find the mass, in grams of H2O, of 0.1372 moles of H2OPlease type just the number in standard notation with the correct# of SF’s without the unit below. Question at position 66 4 points Question 6 is unpinned. Click to pin. Question at position 6 Find the number of moles of H2O of 2.65 * 1022 molecules of H2OPlease type just the number in standard notation with the correct# of SF’s without the unit below. Find the number of moles of H2O of 2.65 * 1022 molecules of H2OPlease type just the number in standard notation with the correct# of SF’s without the unit below. Question at position 77 4 points Question 7 is unpinned. Click to pin. Question at position 7 Find the mass, in grams of CO2, of 8.08 x 1023 molecules of CO2Please type just the number in standard notation with the correct# of SF’s without the unit below. Find the mass, in grams of CO2, of 8.08 x 1023 molecules of CO2Please type just the number in standard notation with the correct# of SF’s without the unit below. Question at position 88 4 points Question 8 is unpinned. Click to pin. Question at position 8 Find the number of molecules of NH3, of 7.53 grams of NH3Please type just the number in scientific notation with the correct# of SF’s without the unit below. Write your scientific notation exponent as 10^23 (e.g. 1.49*10^23)Find the number of molecules of NH3, of 7.53 grams of NH3Please type just the number in scientific notation with the correct# of SF’s without the unit below. Write your scientific notation exponent as 10^23 (e.g. 1.49*10^23)Question at position 99 4 points Question 9 is unpinned. Click to pin. Question at position 9 A sample contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen. The molar mass is 90 g/mol. The empirical formula isQuestion Blank 1 of 1.Question at position 1010 4 points Question 10 is unpinned. Click to pin. Question at position 10 A sample contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen. The molar mass is 90 g/mol. The molecular formula isQuestion Blank 1 of 1.Question at position 1111 2 points Question 11 is unpinned. Click to pin. Question at position 11 Consider the following species when answering the questions that follow:(i) PF3 (ii) CH2F2 (iii) BH3 (iv) CF4 (v) NH3Please draw the 5 lewis structures above and upload this to the last question of the exam! In the Lewis structures ofQuestion Blank 1 of 1the central atom has one lone pair of electrons.Question at position 1212 2 points Question 12 is unpinned. Click to pin. Question at position 12 Consider the same following species when answering the questions that follow:(i) PF3 (ii) CH2F2 (iii) BH3 (iv) CF4 (v) NH3In the Lewis structures ofQuestion Blank 1 of 1the central atom has no lone pairs of electrons.Question at position 1313 2 points Question 13 is unpinned. Click to pin. Question at position 13 Consider the same following species when answering the questions that follow:(i) PF3 (ii) CH2F2 (iii) BH3 (iv) CF4 (v) NH3In the Lewis structures ofQuestion Blank 1 of 1the central atom has three bonds.Question at position 1414 2 points Question 14 is unpinned. Click to pin. Question at position 14 Consider the same following species when answering the questions that follow:(i) PF3 (ii) CH2F2 (iii) BH3 (iv) CF4 (v) NH3In the Lewis structures ofQuestion Blank 1 of 1the central atom has four bonds.Question at position 1515 2 points Question 15 is unpinned. Click to pin. Question at position 15 Consider the same following species when answering the questions that follow:(i) PF3 (ii) CH2F2 (iii) BH3 (iv) CF4 (v) NH3In the Lewis structures ofQuestion Blank 1 of 1the molecular VSEPR shape is tetrahedral.Question at position 1616 2 points Question 16 is unpinned. Click to pin. Question at position 16 Consider the same following species when answering the questions that follow:(i) PF3 (ii) CH2F2 (iii) BH3 (iv) CF4 (v) NH3In the Lewis structures ofQuestion Blank 1 of 1the molecular VSEPR shape is trigonal pyramidal.Question at position 1717 2 points Question 17 is unpinned. Click to pin. Question at position 17 Consider the same following species when answering the questions that follow:(i) PF3 (ii) CH2F2 (iii) BH3 (iv) CF4 (v) NH3Question Blank 1 of 1are polar molecules.Question at position 1818 2 points Question 18 is unpinned. Click to pin. Question at position 18 Consider the same following species when answering the questions that follow:(i) PF3 (ii) CH2F2 (iii) BH3 (iv) CF4 (v) NH3Question Blank 1 of 1are nonpolar molecules.Question at position 1919 10 points Question 19 is unpinned. Click to pin. Question at position 19 Explain how to name an ionic compound that has a transition metal that can have multiple charges. Your answer should contain (1) the name and formula of the compound and (2) reasoning for the writing the name and formula as suchYou may upload a video or essay with audio (the formulas and names must be written)There is a word count below the text area.Display keyboard shortcuts for Rich Content EditorExplain how to name an ionic compound that has a transition metal that can have multiple charges. Your answer should contain (1) the name and formula of the compound and (2) reasoning for the writing the name and formula as suchYou may upload a video or essay with audio (the formulas and names must be written)12ptParagraph 0 wordsQuestion at position 2020 10 points CalculatorQuestion 20 is unpinned. Click to pin. Question at position 20 Explain how to calculate the number of oxygen atoms (not molecules) in a sample that contains 46.2 grams of oxygen.Your answer must contain an explanation as to how you calculate the problem, including what conversion factors you used, and the final answer with units and the correct number of significant figures. You may upload a video/audio/essay.There is a word count below the text area.Display keyboard shortcuts for Rich Content EditorExplain how to calculate the number of oxygen atoms (not molecules) in a sample that contains 46.2 grams of oxygen.Your answer must contain an explanation as to how you calculate the problem, including what conversion factors you used, and the final answer with units and the correct number of significant figures. You may upload a video/audio/essay.12ptParagraph 0 wordsQuestion at position 2121 10 points Question 21 is unpinned. Click to pin. Question at position 21 Please state both the VSEPR shapes and polarity for (1) BF3 and (2) NF3 Your answer should have the lewis structure drawn for both structures, with the VSEPR electronic and molecular geometries, along with the polarity of the molecule as well as the bond polarities. You may upload an essay/video/audio with a photo (JPEG or PDF) of the lewis structuresThere is a word count below the text area.Display keyboard shortcuts for Rich Content EditorPlease state both the VSEPR shapes and polarity for (1) BF3 and (2) NF3 Your answer should have the lewis structure drawn for both structures, with the VSEPR electronic and molecular geometries, along with the polarity of the molecule as well as the bond polarities. You may upload an essay/video/audio with a photo (JPEG or PDF) of the lewis structures12ptParagraph 0 wordsQuestion at position 2222 10 points CalculatorQuestion 22 is unpinned. Click to pin. Question at position 22 This is your last question before you need to upload your scratch work.Please select one molecule that has resonance and do the following: 1. Write the formula and name of the compound (molecule you selected)2. Draw out the resonance lewis structures3. Explain why the compound has resonanceYou may upload a essay/video/audio with a photo (JPEG or PDF) of the lewis structures.