Chemistry > EXAM > SCIN 131 Lesson 5 Quiz (All)

SCIN 131 Lesson 5 Quiz

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Feedback:Empirical Formula discussed in Chapter 6.2. Question 7 of 25 0.0/ 4.0 Points `I was wading in the creek and discovered what I thought to be a small meteorite. I took it home and found its... mass to be 5.50 kg. I ran some fancy schmancy chemical tests on it, and determined that the mass of nickel within the sample was 250.0 grams. What is the mass percent of nickel in the meteorite? A. 0.4545%  B. 4.545%  C. 0.5454%  D. 45.45% Feedback:Mass percent discussed in Chapter 6.2. Question 8 of 25 0.0/ 4.0 Points `Tabun (C5H11N2O2P) is one of the first nerve agents discovered, and this liquid is known for a fruity odor and can be sprayed as a mist that causes convulsions and paralysis. Tabun itself is not extremely deadly, but the success of this chemical compound in war led to the development of deadlier toxins like soman (C7H16FO2P) and sarin (C4H10FO2P). Iraqi soldiers used Tabun in the final days of the Iran/Iraq war to kill thousands of Iranians. Which of these compounds contains the highest percentage of phosphorus by mass?  A. tabun B. soman  C. sarin  D. All of these compounds have the same percentage of phosphorous. Feedback:Mass percent discussed in Chapter 6.2. [Show More]

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