CHEM 131 Introduction to Chemistry with Lab Test | Guide 2023

CHEM 131 Introduction to Chemistry with Lab Test | Guide 2023. Suppose you were tasked with producing some nitrogen monoxide (a.k.a. nitric oxide). I'm sure this is often requested of you. You can do it by combusting ammonia (be careful!). The equation would be as follows: 4NH3 + 5O 2→ 4NO + 6H2O. If you form 3.50 mol of water, how much NO forms? A.2.33 mol. B.4.00 mol. C.4.50 mol. D.6.75 mol. E.none of the above Answer Key: A Feedback: Good. See section 8.6 Question 9 of 12 0.0/ 4.0 Points `Sodium and chlorine are very dangerous by themselves. However, when we combine them together in a chemical reaction, we eat it--it's table salt: 2Na + Cl2 → 2NaCl. If I want to make 100.0 g of my own salt (because I can and that's how I roll), how much elemental chlorine would I need? NOTE: All numbers located immediately after elemental symbols should be considered subscripts. A.100.0 g B.50.0 g C.25.0 g D.60.67 g E.not enough information Answer Key: D Feedback: See section 8.6 Question 10 of 12 0.0/ 4.0 Points `Sodium and chlorine are very dangerous by themselves. However, when we combine them together in a chemical reaction, we eat it--it's table salt: 2Na + Cl2 → 2NaCl. If I want to make 50.0 g of my own salt (because I can and that's how I roll), how much elemental sodium would I need? NOTE: All numbers located immediately after elemental symbols should be considered subscripts. A.50.0 g B.100.0 g C.22.99 g D.19.67 g E.not enough information Answer Key: D Feedback: See section 8.6 Part 4 of 4 - 0.0/ 10.0 Points Question 11 of 12 0.0/ 5.0 Points `Alkali metals are extremely reactive with water. Suppose I give you a 55.50 g chunk of cesium and you throw it into a lake. When it reacts with water to form cesium hydroxide and hydrogen gas, how much hydrogen in grams is theoretically produced? Write a balanced equation for the reaction and show all work clearly and in detail to receive credit. All numbers seen immediately following the elemental symbols are intended to be subscripts. Feedback: Use your limiting reactant to predict product formation. Comment: No solution...:o( Question 12 of 12 0.0/ 5.0 Points `Consider the solubility rules and identify all of the spectator ions when the following chemicals react: A) lead (II) nitrate and ammonium chloride B) Barium bromide and potassium carbonate. You must show all work (equations) clearly and in detail to receive credit. Feedback: This concerns net ionic reactions and the formations of precipitates. Comment: No solution Diane..? Lesson 4 Quiz Return to Assessment List Part 1 of 3 - 8.0/ 20.0 Points Question 1 of 12 0.0/ 4.0 Points `Having learned about electromagnetic radiation in this lesson, which of these statements about it is true? A.when wavelength increases, energy decreases B.when wavelength increases, frequency increases C.Red light wavelength is shorter than green light. D.when energy increases, frequency decreases E.none of the above Answer Key: A Feedback: See section 9.3 Question 2 of 12 4.0/ 4.0 Points `In terms of wavelength, which of these is the longest? A.Infrared Radiation B.Radio Waves C.Gamma Rays D.Microwaves E.X-rays Answer Key: B Feedback: Good. See section 9.3