SCIN 131 (SCIN 131)

SCIN 131 Lesson 4 Quiz Question 1 of 12 4.0/ 4.0 Points `In terms of the size of the atom, which of these is the smallest? A.Ne B.Be C.O D.B E.Li Answer Key: A Feedback: Good. See section 9.9 Question 2 of 12 4.0/ 4.0 Points `If you were to put the different wavelengths of the electromagnetic spectrum (as discussed in THIS lesson) in the correct order from shortest to longest, which would be third? A.ultraviolet B.microwaves C.infrared D.x-rays E.radio waves Answer Key: C Fee...

Question 1 of 25 4.0/ 4.0 Points `Eureka! I've discovered a new compound! Yay for me. I have determined that its empirical formula, but in order to determine its actual molecular formula, I need to know which of the following? •A. the number of moles of the compound in a 1.00 g sample of the substance •B. the density of the compound •C. the boiling point and freezing point of the compound •D. the molar mass of the compound. •E. none of these

Question 5 of 32 3.0/ 3.0 Points `I was wading in the creek and discovered what I thought to be a small meteorite. I took a small sample of it home, ran some fancy schmancy chemical tests on it, and determined it was 18.0% chromium by mass. How many grams of this meteorite would I need to be able to have 15.0 g of chromium?  A. 100  B. 120.0  C. 2.7  D. 83.3 Feedback: Great! Mass percent discussed in Chapter 6.2. Question 6 of 32 3.0/ 3.0 Points Since 1983, pennies h...

Question 8 of 25 4.0/ 4.0 Points Which of the following is equivalent to STP? • A. 0 K and 1 atm • B. 32*C and 760 mmHg • C. 273.15 K and 760 torr • D. 273.15 K and 750 mmHg Feedback: Great! Gas Laws are discussed in Chapter 8. Question 9 of 25 4.0/ 4.0 Points`Suppose you have a fixed container containing 18.0 g of He gas. If the container volume is 3.00 L and the temperature is 298.15 K, what is the pressure in the atm? (R= 0.0821 L ∙ atm / mol ∙ K) • A. 36.7 atm ...

Question 13 of 25 4.0 Points The first scientist to show that atoms emit any negative particles were A.J. J. Thomson B.William Thomson C.John Dalton D.Ernest Rutherford E.Lord Kelvin Answer Key: A Question 14 of 25 4.0 Points `How would you correctly write the atomic symbol for sulfur? A.Si B.S C.Su D.Se E.none of the above answer Key: B Feedback: See the periodic table

SCIN 131 Lesson 5 Quiz GRADED A /SCIN 131 Lesson 5 Quiz GRADED A /SCIN 131 Lesson 5 Quiz GRADED A

SCIN 131 LESSON 6 WEEK 6 QUIZ GRADED A /SCIN 131 LESSON 6 WEEK 6 QUIZ GRADED A /SCIN 131 LESSON 6 WEEK 6 QUIZ GRADED A

SCIN 131 quiz 6 Question 1 of 25 4.0/ 4.0 Points `I'm looking at the barometer in my lab as I type this question. It says the pressure is 760 torr. What is this pressure expressed in mm Hg?  A. 1  B. 760  C. 14.7  D. 29.92 ANS: B