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You are cunullant Ennc of thc [uo eminent Dr R Rye-Barc and Dr. Valerie ( V4l7) curaul BioMolucukcs Rulel " They nary Enl hclo t0 unvel tcir Teocnl dl Plenss ...

Question

You are cunullant Ennc of thc [uo eminent Dr R Rye-Barc and Dr. Valerie ( V4l7) curaul BioMolucukcs Rulel " They nary Enl hclo t0 unvel tcir Teocnl dl Plenss provide MnerUcLuln cumneundi LCDT Orpound: ^ and B 'diaxtercomen Ind pure Malch enconaenr Demixtueof Cand D slch arecleo Adinalalonnan Cotpound thaechira] comtexmd shown Lrlow Tna anrnen AHITETLE HHO Htum ou t0 Helerlmn FnMenrcun aho4n PIRumoAetlt IJ @o. TNHSQ, C1CHL OCiLO.IJHCr 3H-FUEaso. 9HO"c C;Hiosp C,Hio,QncQHCHO- (olo

You are cunullant Ennc of thc [uo eminent Dr R Rye-Barc and Dr. Valerie ( V4l7) curaul BioMolucukcs Rulel " They nary Enl hclo t0 unvel tcir Teocnl dl Plenss provide MnerUcLuln cumneundi LCDT Orpound: ^ and B 'diaxtercomen Ind pure Malch enconaenr Demixtueof Cand D slch arecleo Adinalalonnan Cotpound thaechira] comtexmd shown Lrlow Tna anrnen AHITETLE HHO Htum ou t0 Helerlmn FnMenrcun aho4n PIRumo Aetlt IJ @o. TNHSQ, C1 CHL O CiLO. IJHCr 3H-FUEaso. 9HO" c C;Hios p C,Hio, Qn cQH CHO- (olo - 0 CHON ACH,On 1)144 2)HO' {Cul Dete socL FCH,O Finire 'HNMR of G and H



Answers

The clcctronic configurarions of four clemcnts arc givcn as undcr: (I) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{5}$ (II) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{4}$ (III) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{3}$ (IV) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6 \mathrm{i}} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{1}$ Which of rhe following arrangemcnts gives thc corrcct ordcr in rerms of increasing clectroncgariviry of the clcments? (a) $\mathrm{III}<\mathrm{II}<\mathrm{IV}<\mathrm{I}$ (b) $\mathrm{II}>\mathrm{III}>\mathrm{I}>\mathrm{TV}$ (c) $\mathrm{IV}<\mathrm{III}<\Pi<\mathrm{I}$ (d) $I<$ II $<I I I<\Pi V$

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

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.

Mm. Hi, welcome to question number 42. In this question, you want to know if we have 25 micrograms of c. 21 age, 30 oh two, We want to know how many moles that is and then how many molecules that represents. So to do this, we are going to need the molar mass of this substance. So we're going to add 21 carbons to the molar mass of 30 hydrogen to the molar mass of two oxygen and I get 314 0.45 So the Mueller mass 3 14 0.45 Of course that would be grams per mole. Right, So I'm going to use this information set up a little bit of dimensional analysis here. First thing I need to do is to get my micrograms two g. So I know that there are one times 10 to the sixth micrograms of anything in one g. Now I can use my molar mass. So there are 314.45 g of C. 21. Age 30 oh two in every mole of the substance. Mhm. Notice I put the grams in the denominator so that they will cancel. So the only unit I have remaining now is moles. So I can go ahead and calculate my answer here. And I'm going to round it to two significant figures since 25 only had two and I get eight point oh times 10 to the negative eighth of the C. 21. Age 30 oh two. Okay, the next thing I want to do then, so let me circle that. That is our first answer. That is the number of moles. Eight times 10 to the negative eight moles. Next thing we want to do is figure out how many molecules this is. So starting with my number of moles eight times 10 to the negative eight moles of C. 21 H 30 02 We need to use of God Rose number because we know there are avocados number of particles in one mole of anything. So six point oh 22 times 10 to the 23rd. That is avocados number. Okay, molecules of the C 21 H 30 02 in every mole of the C 21 H 30 02 What? All right, so mobile cancel and I get a number in number of molecules again rounding the two significant figures. I get 4.8 times 10 to the 16th molecules of C 21 age 30 oh two. So that is the answer to the second part of this question. Thank you so much for joining me.

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.


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