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Answers

At least $25 \mu \mathrm{g}$ of tetrahydrocannabinol $(\mathrm{THC}),$ the active ingredient in marijuana, is required to produce intoxication. The molecular formula of $\mathrm{THC}$ is $\mathrm{C}_{21} \mathrm{H}_{30} \mathrm{O}_{2}$. How many moles of THC does this 25 \mug represent? How many molecules? (b) Caffeine, a stimulant found in coffee, contains $49.5 \% \mathrm{C}$, $5.15 \% \mathrm{H}, 28.9 \% \mathrm{~N},$ and $16.5 \% \mathrm{O}$ by mass and has a molar mass of $195 \mathrm{~g} / \mathrm{mol}$. (c) Monosodium glutamate (MSG), a flavor enhancer in certain foods, contains $35.51 \% \mathrm{C}, 4.77 \% \mathrm{H}, 37.85 \% \mathrm{O},$ $8.29 \% \mathrm{~N},$ and $13.60 \% \mathrm{Na},$ and has a molar mass of $169 \mathrm{~g} / \mathrm{mol}$

First of all, let's have a look at what all is given in the problem. It is given that The activity of tetra hydro Sinem beall, which contains 70% of hydrogen atoms. That means carbon atom is 70% of hydrogen atoms. And it has given that hydrogen items is 15 times of oxygen, atom. 15 times of oxygen atom. And it is also given that one g one g contains 0.00318 moles of tetra hydro Kaname Beall. So what we are supposed to find out her, we have to find the molecular formula of the compound. We have to find a molecular formula of the compound. So first of all, let the number of hydrogen atoms react. Let hydrogen atoms equals two X And oxygen atoms equals two wife. So according to the conditions given, we can say that number of carbon atoms is 70% of X 70% of X. And a number of hydrogen atoms is what according to the given conditions, number of hydrogen atom ish 15. My. So this will change to 70% of 15 by so now the number of carbon items will become number of carbon atoms will become 70 502, 15 by so it will be like seven by 10 into 15 by this will be the number of carbon items. No let's tabulate bees for carbon for hydrogen for oxygen atomic ratio is work atomic ratio for carbon, it is seven by 10 to 15. So 5 to 10, 5, threes of 15, it will come around 21 by two For hydrogen at this 15 for oxygen. It is one. Now simple atomic ratios will be 21 30 and two. So from here we can calculator empirical formula empirical formula will be C 21 H 30 or two. This is the m vertical formula. Now it's molecular formula will be its molecular formula will be 10 times of C21 age 30. and go to we can calculate the molar mass from here more landmarks of the compound that is And Times 21 and 2. 12. Flash 13 to 1 Plus 16. In total, this will be the molecular mass. So we will get approximately the Muhlemann z equals two. This will be the molar mass of the molecular formula given now we know that one g contains 0.00318 more. So one mole of compound will have how much we can calculators by cross multiplying So x equals to one and 2. x 0.0031. It This will come around 314.5 g. No, If we make considerate as one and this is to if we create both of these we will get N equals two. We will get approximately equal to 314 and plus 314.5. So we will get the value of an approximately equal to one. Does the molecular formula of the compound ish molecular formula of the compound is C 21 H 30 02. Hence the correct option is option number B, That is C- 21 H- 30 or two.

Hi everyone. So in this question they asked the electronic compilation of four elements are given as and uh one is managed to reassure people. The second managed to two years to do before 30s managed to do is to to be 3420s. When I should we ask you to pay six years 23 people? Which of the following enrichment gives the character order in terms of increasing electronic equity of lemons. So option she is correct. Oh son. Yeah. See is correct. Mhm correct. Alder off. Okay. Increasing electronic entity of the lemon teas increasing. Okay. Mhm. Electronica activity. Mm. Mhm. Yeah. Of the element ease. Mm As follows. Yeah. One X two creation To be 6 3 ash too three p 1 we can say at live India smaller than Okay. One is to to rest. Oh yeah to be three that is nitrogen which is smaller than nice to us to be for decades oxygen. Mhm Yeah, it is smaller than 1" to 3 years to to be for you that is floating chlorine. Is the lament having a guest electronic. It'd in the periodic table Florrie is the Lemon Read I. Yeste 11 12 negativity in the periodic table and erotic devil. Thanks loved

Try to look at this question. It is given that among 143 subjects with positive test results, So let over here, let this be positive people who are actually positive like this with people who are actually negative. And let this be the test side. So who have tested positive? And these are the people who have tested negative. All right, So it is given that among 143 subjects with positive test results with positive test results, which means that the some of this column is 1 43. Yeah, right. In this case, Okay. 24 are false. Positive results. 24 are false. Positive results. Which means this is 24. They're actually negative by the tested positive. So what is the remaining one? 43 minus 24. That it's 119 after that, Among 157 negative results. This is 1 57 among 1 57 negative results. There are three false negative results. There are three false negatives, false negatives. What is the meaning of false negatives? That means that they are actually positive, but they have tested negative. So this is three. This is 1 53. Okay. How many subjects are included in the study? How many? Some things are included in the study 300. How do I find this? The addition of these two 300 subjects are included in the study. What is the next question? The next one is how many subjects had two negative result. How many subjects to negative result 1 53 1 53. After that. What is the probability that a randomly selected subject had a true negative result? The probability that the randomly selected subject had a true negative result. It will be 1 53 upon 300 1 53 divided by 300. Now, what is going to be the answer? In this case, we need to use a calculator. And so just give me a moment. This is turning out to be 0.513 By the way, what we're doing wrong is 1 57 minus three is 1 54. So this is 1 54. So this answer is 1 54. This answer is 1 54 and hence this is also 1 54. Now, let's try to calculate this 1. 54.300 0.513 This answer is zero point 513 These are my ancestors. Thats all I needed, right? Yeah, these are my answers.

This question now you just It says if one off the test subjects is randomly selected, find the probability that the subject did not use marijuana. Find the probability of the subject that he did not use marijuana. These are the total subjects who did not actually use marijuana. These are truly negative. These are the ones who are negative and who have also tested negative. But these are the ones who are negative but who have falsely been tested positive. So 24 plus 1 54 is 1 78 1 78 by 300. This is the probability that we want. And do we think the result affect the general population rate off subjects who do not use marijuana? I think the result is somewhat low for people who do not use marijuana. By the way, this value turns out to be 0.59 something zero point Faith Night. And this is my answer


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