10th Science | Chapter 7 Book Back Part 3 | TN State Board | Prakash Sir

Added: 2026-05-15

[00:00:13]Good evening my dear warriors.

[00:00:16]Welcome to TN State Board Vidantu channel. This is your captain Rakash.

[00:00:23]Good evening Basangla. Welcome to the session. Tell me whether my audio and video is clear.

[00:00:29]Yes. Audio.

[00:00:33][snorts] [clears throat] Good evening.

[00:00:41]Yes. Good evening.

[00:00:44]Okay.

[00:00:52]N due to some issue right Karishma Rahul Jessica Mitra 7 to 8 gap keska.

[00:01:25]Okay. Right.

[00:01:28]J Krishant/i and moreover coming Saturday right in the Saturday we are going to have a 4 hours marathon plus V quiz. So in the 4 hours marathon line by line.

[00:02:22]Okay.

[00:02:25]Okay. Right. Right. Right.

[00:02:28]Okay. Right.

[00:02:39]Notification.

[00:02:42]Super. Super.

[00:02:44]Marathon.

[00:02:57]price increase 49 2 3 Right. Good. Good. Good.

[00:03:33]Download Kiran Dini. Right. Okay. Kiran Dini go.

[00:03:46]Heavy rain in Kanyakumari. Kavishri Kiran Kartika. Okay. Right. Right.

[00:03:52]Tavan. Good.

[00:04:04]Versa right.

[00:04:07]Okay. Good.

[00:04:11]Right.

[00:04:18]That is one of the very very important for your future.

[00:04:25]So doubt measurements lesson.

[00:04:51]First lesson.

[00:05:02]How to find valency?

[00:05:11]Right.

[00:05:15]Oh, okay. Right.

[00:05:21]Okay. Right.

[00:05:26]Super good.

[00:05:28]Okay. Okay. Right.

[00:05:39]You can join there.

[00:05:54]scholarship.

[00:05:56]So you can call this number right atoms and So a lot of discussions, Right.

[00:06:50]Yes. Good evening.

[00:06:53]PDF masterfick.

[00:07:23]playlist.

[00:07:26]Master PDF link for English.

[00:08:05]Good evening. Good morning. Okay. Right.

[00:08:08]Good evening.

[00:08:15]medium is opening.

[00:08:24]Ready.

[00:08:30]Downloading downloading.

[00:08:45]But this is official app right.

[00:09:21]So they think that I'm also a student.

[00:09:40]Okay. Okay. Right. spam.

[00:09:47]Literally need online coaching.

[00:10:11]2027. You can join that.

[00:10:24]One of the most most important question Seven mark question Syria right. Mhm.

[00:11:07]A ra ready.

[00:11:39]Right. God's grace.

[00:11:43]It is not good.

[00:11:52]message.

[00:12:08]Right.

[00:12:18]Direct seven mark right derive the relation between relative molecular mass and vapor density.

[00:12:32]Relation between relative molecular mass and vapor density.

[00:12:46]Relative molecular mass.

[00:13:09]relation.

[00:13:12]So relative molecular mass.

[00:13:25]What is relative molecular mass? What is vapor density?

[00:13:32]So relative for example relative relative Relative relative carbon 12. Very good.

[00:14:14]1 by 12 of carbon 12 isotope. Very good.

[00:14:16]Very good. 1x2 of mass of carbon 12 isotope. Relative relative atomic mass.

[00:14:41]Relative atomic mass atomic molecular relative molecular mass in the vapor density.

[00:15:24]Vapor density.

[00:15:28]What is density?

[00:15:36]For example, AR density A or B standard video PDF area molecules Come here.

[00:17:18]For example, in the water in the water bottle.

[00:17:33]density density. Water vapority density particular amount of vapor density Relation RM= 2.

[00:18:12]Final answer.

[00:18:25]One of the most important topic. One of the most important topic.

[00:18:32]Is the video clear? Video.

[00:18:46]Right. Okay. Okay. Okay. Right.

[00:18:51]Vision.

[00:18:56]The relative molecular mass of gas or vapor is the ratio between the mass of one molecule of gas or vapor to the mass of one atom of hydrogen.

[00:19:21]forgap as vapor.

[00:19:59]Relative molecular mass.

[00:20:03]First, relative molecular mass.

[00:20:15]Y relative molecular mass is equal to ratio.

[00:20:35]Ratio Any idea? Put it in the chat box.

[00:20:53]Very good. Very good. Very good.

[00:21:08]Mass of the one molecule of the gas or vapor. Mass of one molecule of gas or vapor.

[00:21:17]Mass of one molecule.

[00:21:31]CO2. CO2, sulfuric acid, HCl, Nale divided by mass of one hydrogen atom.

[00:22:05]Hydrogen one hydrogen atom.

[00:22:18]See She's one of the top teacher in >> [snorts] >> Unwanted message Right. Super relative molecular. Yes.

[00:23:35]One molecule of gas or vapor.

[00:23:42]for density.

[00:23:58]Relative molecular mass equal to is defined as relative molecular mass is the ratio ratio ratio mass of one molecule of gas or vapor to the mass of one hydrogen atom.

[00:24:37]Master PDF.

[00:24:41]Master PDF launch.

[00:24:54]for the foreign.

[00:25:31]So now for message master.

[00:26:17]difference.

[00:26:24]See sometimes I will never respect you.

[00:26:46]students emotions.

[00:27:15]11. You are matured.

[00:27:27]for No problem. No problem. Huh.

[00:28:01]Diagram.

[00:28:15]PDF download first.

[00:28:36]Vu, it is a ratio.

[00:29:13]Ratio mass of one molecule.

[00:29:20]One molecule.

[00:29:32]Mass of one molecule of gas or vapor.

[00:29:41]Mass of one molecule of gas or vapor.

[00:29:55]Mass of one. Mass of one molecule. One molecule mass of one mole. Mass of one mole divided by mass of one hydrogen atom.

[00:30:14]Hydrogen What a name Right.

[00:32:19]Half an hour starting this question is that kind of Question mass of one molecule of gas divided by mass of one hydrogen atom.

[00:33:00]Hydrogen ratio relative molecular mass relative oxygen but carbon relative molecular mass.

[00:33:50]Mass of one molecule of gas or weapon.

[00:33:55]Molecule mass divided by mass.

[00:34:03]Clear. That's it.

[00:34:09]Vapor density.

[00:34:18]Mass of given volume of gas divided by mass of same volume of hydrogen. Simple.

[00:34:26]Simple.

[00:34:29]Vapor density is equal to read a ratio ratio.

[00:34:54]master.

[00:35:15]Mass of volume of Yes.

[00:35:23]Or vapor radar.

[00:35:31]H oxygen oxygen for example example I'm just telling oxygen cylinder.

[00:36:29]So simple.

[00:36:44]given volume. For example, volume mass volume. For example, Mass of volume of the gas or vapor.

[00:37:14]Right? Huh? Right. Right. Okay. H right.

[00:37:18]Mass of volume of gas or vapor divided by mass of same volume of hydrogen.

[00:37:45]right? Okay.

[00:37:50]Mass of volume of gas or vapor divided by mass of same volume of hydrogen.

[00:37:58]Mass of volume of gas or vapor divided by mass of same volume of hydrogen.

[00:38:06]Okay.

[00:38:08]Nass of given volume of gas or vapor at stb standard temperature pressure divided by mass of volume of hydrogen divided by mass of volume of hydrogen. Why? Same volume of hydrogen.

[00:38:34]question.

[00:38:35]The full question Yeah. Okay. Right.

[00:38:59]Vapor density equal to mass of given volume of gas or vapor divided by mass of same volume of hydrogen. Right. same volumemail.com.

[00:39:28]You just put a mail.

[00:39:36]You just mention it. H.

[00:39:40]Ah. Yes. Very good.

[00:40:00]for mass of simple one molecule divid divided by mass of one H atom. Right?

[00:40:49]Given volume of the gasi given volume of gas divided by mass of same volume of hydrogen radar.

[00:41:21]super gas in the gas concept, right? So, I'm going to bring a twins.

[00:42:13]I'm having a twins.

[00:42:18]number. Okay. Right. That's good. Good.

[00:42:20]Good. Good.

[00:42:38]ate.

[00:43:41]Okay. Right. Right. Right.

[00:43:49]orch.

[00:46:53]Right. Superins.

[00:47:03]So we have twins. biology.

[00:47:09]This is the twins twins water bottle hypothesis already equal volume of all gases contain equal number of molecules.

[00:47:27]Equal volume of all gases.

[00:47:35]Equal volume of all gases.

[00:47:42]Mass of given volume of the gas. Mass of given volume of the gas.

[00:47:53]Hydrogen volume equal volume of all gases wherever volume.

[00:48:31]molecules.

[00:48:50]the point according to equal volume of all gases contain equal number of molecules.

[00:49:02]One molecule of the gas, one molecule of hydrogen.

[00:49:11]Okay. Mass of one molecule of hydrogen gas equal.

[00:49:26]One of Volume of the gas, volume of hydrogen.

[00:50:00]So wait for Right.

[00:50:35]So oxygen molecules Counter mass of one molecule of the gas. Mass of one molecule of gas equal to mass of n molecules of gas divided by mass of one molecule.

[00:51:32]equal to mass of n / n.

[00:51:46]Right.

[00:52:07]for mass of n molecules of gas divided by n.

[00:52:32]torture.

[00:52:33][sighs] [laughter] English.

[00:53:14]Right.

[00:53:31]relative molecular mass divided by VD of N molecule equal So mass of one molecule equal to divided by mass of na cancel is equal to hydrogen.

[00:54:38]Hydrogen gas.

[00:54:47]Oxygen gas.

[00:54:51]Oxygen gas.

[00:54:59]Oxygen.

[00:55:05]O2. Very good. Very good. O2. Hydrogen, nitrogen, chlorine, gas.

[00:55:51]Ah right. So mass of molecule mass of same volume of same volume of Oh my god.

[00:56:21]2 H2 H2 H2apass of one molecule of gas divided by 2 into mass of one hydrogen atom.

[00:56:53]H2 into mass of one atom of hydrogen.

[00:57:14]in the in the formula.

[00:57:28]RM equal to mass of one molecule of gas divided I mass of one hydrogen atom.

[00:58:10]Mass of volume of gas.

[00:58:17]Mass of N molecule of gas divided by 2 into mass of hydrogen atom.

[00:58:38]mass mass of molecule of gas divided by 2 into mass of hydrogen atom. 2 into mass of one hydrogen atom into [clears throat] mass of gas. Very good. Yes. Very good. Very good.

[00:59:23]Right. Okay.

[00:59:34]Right. One.

[00:59:36]See that mass of V is equal to RM by 2.

[01:00:00]V is equal to RM by 2.

[01:00:04]RM equal to 2 * V.

[01:00:32]So easy question.

[01:01:01]Master Master PDF.

[01:01:20]Master PDF. Master PDF.

[01:01:55]So relative molecular mass relative Hydrogen ratio between mass of one molecule of the gas. Right? Mass of one molecule of gas or vapor to the mass of one hydrogen atom.

[01:02:44]difference given volume of gas divided by same volume of hydrogen.

[01:02:58]Number of molecules in one volume.

[01:03:06]VTP equal to mass of N molecules of gas or vapor at STP divided by mass of N molecules of hydrogen.

[01:03:18]Given volume same volume hydrogen diatomic gas. Hydrogen is not a monatomic gas. It is a diatomic gas.

[01:03:59]Mass of one molecule of gas or vapor divided by mass of two atoms of hydrogen.

[01:04:08]Very good. H2 hydrogen atom 2 into mass of one hydrogen mass of one molecule of gas divided mass of one atom V= RM relative molecular mass divided by two relative molecular massal into vapor density relative molecular massal = to 2 into vapor density. One of the most most most important question.

[01:04:46]Most important question. Most most important question.

[01:04:53]Important question.

[01:05:01]Right.

[01:05:07]Special session arrange Saturday. This Saturday we are having a special session.

[01:05:14]Saturday we have a 4 hours marathon. 4 hours complete marathon.

[01:05:24]Okay.

[01:05:35]literally. Thank you so much.

[01:05:50]Morning 10 a.m. Morning 10 a.m.

[01:05:54]10 a.m. Okay.

[01:06:10]Marathon Saturday. Marathon Saturday.

[01:06:12]Saturday marathon 10 to2. Yes.

[01:06:17]complete line by line read line by line.

[01:06:20]So line by line school evening Saturday night already line by line. Right. Super.

[01:07:15]Okay.

[01:07:18]Booking 40 minutes.

[01:07:38]Right.

[01:07:59]How many of you know OD square?

[01:08:02]What is OD square?

[01:08:06]squaref o d² no okay last year we left it H O D² O D² H one day one detail.

[01:09:00]One day, one detail.

[01:09:03]I think 96 details long answer.

[01:09:24]Ready?

[01:09:27]One day, one detail.

[01:09:39]dete.

[01:10:05]We will start it as soon as possible.

[01:10:09]Okay.

[01:10:11]Start.

[01:10:15]Okay. Right. Super super right. So first question higher order thinking question.

[01:10:58]Yes. Tomorrow 12th result is confirmed.

[01:11:02]Okay.

[01:11:28]Right. How many moles of calcium carbonate are involved in this reaction?

[01:11:39]Ca CO3 gives Ca plus CO2 right.

[01:11:49]How many moles of calcium carbonate involved in this?

[01:12:01]Just give me the answer.

[01:12:04]H right.

[01:12:09]How many moles?

[01:12:11]Calcium carbonate.

[01:12:13]Calcium carbonate. Calcium carbonate.

[01:12:29]calcium right Ca3 Ca CO2 calcium carbonate calcium oxide dioxide calcium carbonate 1 6.023 23 6.023 into 10^ 23 is the right answer.

[01:13:04]Number of particles.

[01:13:21]6.023.

[01:13:36]Second question, calculate the gram molecular weight of calcium carbonate. Okay.

[01:13:44]Ca3 glec rightium.

[01:14:12]Atomic number oxygen oxygen mass number. Very good. Super 40 40.

[01:14:33]Yes. 40 carbon. Carbon mass number. Very good.

[01:14:38]That is 12. Super oxygen oxygen number that is good. Super it is 16 up 40 into 12.

[01:14:51]16 into 3 6 or 18 remainder 1 1 48 answer 0 remainder 1 100 molecular mass molecular mass 100 g 100 g 100 G answer 100 g 100 g molecular 100 g per moleculate the gram molecular weight of calcium molecular weight per mole per mole. 100 g per mole. The question of carbon dioxide.

[01:16:12]How many moles of carbon dioxide in this reaction? in the reaction of carbon dioxide. Very good. Very good.

[01:16:29]Shanti Shanti.

[01:16:33]One mole. One mole. One mole. One. Super good. Right answer. Very good.

[01:16:38][applause] Super good.

[01:16:45]Creative question exam question paper exam half first revision. Second revision third revision.

[01:17:11]Why the relative molecular mass has no unit? Relative molecular mass. Relative molecular mass.

[01:17:23]Relative molecular mass.

[01:17:38]cancel.

[01:17:51]The relative molecular mass has no unit because it is the ratio of masses.

[01:18:12]Ratio of mass and the units cancel out in calculation cancel right cancel. This is book question. Creative question. Creative question. Creative question.

[01:18:41]compulsory question.

[01:18:45]Write the answer for compulsory question.

[01:19:01]Very good.

[01:19:05]I want the step step wise answer by carbon 1 into 12= oxygen 2 into 16 N 12 32 44 for 44 g.

[01:19:35]Very good. Very good. Super. Good. Good.

[01:19:38]Good. Super.

[01:19:40]Very good. Super. It is 44 g. 44 g.

[01:19:44]Calculate the molecular mass. molecular weight.

[01:19:56]You're going to do it.

[01:19:59]CA 3 Some very good. Super carbon dioxide.

[01:20:26]Yes.

[01:20:51]198 3 into 40 = That is more important.

[01:21:16]2 into 30.

[01:21:21]Oxygen. Oxygen.

[01:21:24]2 4 8 8 into 16. 8 into 16.

[01:21:28]8 into 16.

[01:21:30]120.

[01:21:32]12 + 62 62 31 198 19 38 38 Answer Answer is 38 278 day 8 6 10 3 answer 3 not 8 now.

[01:22:15]Okay. Right.

[01:22:20]words. Creative words.

[01:22:29][snorts] Yes.

[01:22:41]What is the answer for this?

[01:22:48]See number 31 is the actual first scientific theory.

[01:23:26]Atom cannot be destructed.

[01:23:38]First it is a right. So John none it is right.

[01:24:19]Okay. Okay. Good.

[01:24:22]John answer none of this.

[01:24:28]That is the answer.

[01:24:45]for the topic complete.

[01:25:02]We have finished it. Top eight question.

[01:25:14]Saturday we are going to go this lesson line by line.

[01:25:27]Okay. Oh J.

[01:25:30]Okay. Okay. Right. Right. Right.

[01:25:32]Right. Saturday we will conduct week on Saturday.

[01:25:37]Saturday we will cond right. Super. Very good. Good. Good.

[01:25:59]Good. Good.

[01:26:02]physics until unless you learn the concept.

[01:26:12]So we have to complete at least four to five lessons.

[01:26:32]formula.

[01:26:45]Okay.

[01:26:53]Right.

[01:27:02]First question. Okay. Right. Right.

[01:27:06]Right.

[01:27:08]Tada. Bye-bye. If you can't then who can ta bye-bye.