CHM092 PI009P2 by asiah mohamad https://padlet.com/asiahmohamad/pi009p2 Q&A session on Chapter 1: Matter & Stoichiometry en-us 2014-07-09 05:19:08 UTC 2025-11-03 07:06:02 UTC hello@padlet.com http://d262le4z25sx36.cloudfront.net/portraits/rose_close.jpg Madam Asiah Mohamad asiahmohamad https://padlet.com/asiahmohamad/pi009p2/wish/30477307 Salam,

Feel free to ask anything that u don't understand on Chapter 1

*make sure u write your name before u post anything =)

]]> 2014-07-09 05:19:19 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30477307 AR HUSIEN https://padlet.com/asiahmohamad/pi009p2/wish/30479351 How many grams of lead(II) sulfate will be needed to react with sodium chromate to produce 0.3 kg of lead(II) chromate? Sodium sulfate is also produced.PLEASE HELP ME

]]> 2014-07-09 07:22:32 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479351 Mohd Iskandar https://padlet.com/asiahmohamad/pi009p2/wish/30479403 How to calculate fractional abundance of isotopes when the atomic mass and isotopic mass is given?

]]> 2014-07-09 07:27:23 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479403 Muhd imtiyaz https://padlet.com/asiahmohamad/pi009p2/wish/30479476 m1v1=m2v2?

]]> 2014-07-09 07:33:21 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479476 Mdm Asiah asiahmohamad https://padlet.com/asiahmohamad/pi009p2/wish/30479489 2014-07-09 07:33:51 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479489 Mdm Asiah asiahmohamad https://padlet.com/asiahmohamad/pi009p2/wish/30479646 that formula for dilution

]]> 2014-07-09 07:39:12 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479646 AR HUSIEN J https://padlet.com/asiahmohamad/pi009p2/wish/30479647 Owh..so the answer is 281.5 grams of lead(II) sulfate..

]]> 2014-07-09 07:39:17 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479647 Muhammad Hafizuddin https://padlet.com/asiahmohamad/pi009p2/wish/30479669 How to naming molecucar compound?

]]> 2014-07-09 07:40:24 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479669 Iskandar https://padlet.com/asiahmohamad/pi009p2/wish/30479672 PbSO4 + Na2CrO4 --> PbCrO4 + Na2SO4 is the equation right?

]]> 2014-07-09 07:40:33 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479672 Iskandar https://padlet.com/asiahmohamad/pi009p2/wish/30479733 2014-07-09 07:44:27 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479733 Mdm Asiah asiahmohamad https://padlet.com/asiahmohamad/pi009p2/wish/30479770 the eqn seems balanced

]]> 2014-07-09 07:45:46 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479770 Mdm Asiah asiahmohamad https://padlet.com/asiahmohamad/pi009p2/wish/30479784 How do u calculate it?

]]> 2014-07-09 07:46:17 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479784 Mdm Asiah asiahmohamad https://padlet.com/asiahmohamad/pi009p2/wish/30479851 Your question is too general, more specific?

]]> 2014-07-09 07:48:15 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479851 muhd imtiyaz https://padlet.com/asiahmohamad/pi009p2/wish/30479860 whats the different between MaVa/MbVb=a/b and m1v1=m2v2?

]]> 2014-07-09 07:48:37 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479860 Iskandar https://padlet.com/asiahmohamad/pi009p2/wish/30479878 first equation is for neutralization.

second equation is for dilution.

]]> 2014-07-09 07:49:21 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479878 Hafizuddin  https://padlet.com/asiahmohamad/pi009p2/wish/30479925 NH3HCO3?

]]> 2014-07-09 07:51:38 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479925 MUHD NAIM https://padlet.com/asiahmohamad/pi009p2/wish/30479945 how to identify the teoritical yield

]]> 2014-07-09 07:52:45 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479945 Shakimi https://padlet.com/asiahmohamad/pi009p2/wish/30479962 madam can I ask question from chapter 2?

]]> 2014-07-09 07:53:56 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479962 Mdm Asiah asiahmohamad https://padlet.com/asiahmohamad/pi009p2/wish/30479977 Yes u can

]]> 2014-07-09 07:54:30 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479977 Shakimi https://padlet.com/asiahmohamad/pi009p2/wish/30479994 madam can u explain to me about subtopic about additional electron in the same orbital/energy sublevel? im not understand about this..

]]> 2014-07-09 07:55:17 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30479994 Mdm Asiah asiahmohamad https://padlet.com/asiahmohamad/pi009p2/wish/30480017 the theoritical yield is what u can calculate from no of mole of reactant,

actual yield is what u got from experiment

]]> 2014-07-09 07:56:48 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480017 Hafizu https://padlet.com/asiahmohamad/pi009p2/wish/30480031 difference btw molarity and molality?

]]> 2014-07-09 07:57:41 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480031 Iskandar https://padlet.com/asiahmohamad/pi009p2/wish/30480055 theoretical yield is amount you obtain based on the equation

]]> 2014-07-09 07:58:48 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480055 NAim https://padlet.com/asiahmohamad/pi009p2/wish/30480072 what about actual yield, cause there are question ask to find it?

is it we should find teoritical yeild or what?

]]> 2014-07-09 07:59:43 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480072 https://padlet.com/asiahmohamad/pi009p2/wish/30480108 2014-07-09 08:02:05 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480108 shakimi https://padlet.com/asiahmohamad/pi009p2/wish/30480109 if im not mistake naim. first we need to find the theoritical yield and then use the formula 

actual yield/theoritical yield *100%= percent yield from this formula we can find the actual yield

]]> 2014-07-09 08:02:06 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480109 syed abdullah https://padlet.com/asiahmohamad/pi009p2/wish/30480141 madam,what is the function of concentrations expressions?

]]> 2014-07-09 08:04:45 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480141 muhd imtiyaz https://padlet.com/asiahmohamad/pi009p2/wish/30480161 how can we get the previous quiz questions? (mcgraw hill because many things i wanna ask from that questions

]]> 2014-07-09 08:05:39 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480161 syed abdullah https://padlet.com/asiahmohamad/pi009p2/wish/30480288 anyone please help me to explain of this formula molality,m=moles of solute/kg of solvent...i really do not understand about it...thank you

]]> 2014-07-09 08:12:22 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480288 Hanis https://padlet.com/asiahmohamad/pi009p2/wish/30480365 Hafizuddin MOLARITY is moles of solute per 1 liter of solution while MOLALITY is moles of solute per 1 kg of solvent.

]]> 2014-07-09 08:15:36 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480365 NURIN ZULAIKHA https://padlet.com/asiahmohamad/pi009p2/wish/30480400 answer for AR HUSIEN question

mol lead chromate = mole lead(II)sulphate which is 0.000928 mol

mass of lead(II)sulphate is 0.281g. am I right?

]]> 2014-07-09 08:16:14 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480400 shakimi & naim https://padlet.com/asiahmohamad/pi009p2/wish/30480482 molality=moles/kg

molarity=moles/volume

]]> 2014-07-09 08:18:23 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480482 Mohd Hedir https://padlet.com/asiahmohamad/pi009p2/wish/30480503 madam. when we were given a density of a solution, we just simply multiply it with 1000 to get it mass.

such as when we got 1.18g/ml.. we *1000 then get 1180g? right? or is it wrong ? >.<

i can find myself to understand it.. can u help me ? why not use 100 or even 10? why it must 1000?

and how about if we want to find the volume?

]]> 2014-07-09 08:19:12 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480503 NURIN ZULAIKHA https://padlet.com/asiahmohamad/pi009p2/wish/30480627 oh,i'm wrong. the mass of lead chromate is in kg. so, supposely the answer 281.5 g

]]> 2014-07-09 08:22:28 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480627 Mohd Hedir&nbsp; https://padlet.com/asiahmohamad/pi009p2/wish/30480650 is dilution and titration the same?

]]> 2014-07-09 08:23:15 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480650 Hafizudin https://padlet.com/asiahmohamad/pi009p2/wish/30480667 thanks hanis

]]> 2014-07-09 08:23:43 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480667 is this a H20 nolecule photo ? @_@ https://padlet.com/asiahmohamad/pi009p2/wish/30480698 2014-07-09 08:24:20 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480698 Hanis https://padlet.com/asiahmohamad/pi009p2/wish/30480716 well,here's the formula molarity,M =amount of solute (moles) / amount of solution (L) molality,m = moles of solute / mass of solvent (kg)

]]> 2014-07-09 08:24:36 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480716 FIDA https://padlet.com/asiahmohamad/pi009p2/wish/30480728 Question : Copper has two naturally occuring isotopes. 63 Cu ( isotopic mass 62.9296 amu) and 65 Cu ( isotopic mass 64.8278 amu). If copper has an atomic mass of 63.546 amu, what is the percent abundance of each isotope?

Can anyone help me? i want to know the work calculation one by one for it.

]]> 2014-07-09 08:24:48 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480728 ar husien https://padlet.com/asiahmohamad/pi009p2/wish/30480782 Can anyoune explain what is about subatomic particles

]]> 2014-07-09 08:25:54 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480782 Nurul Nabilah https://padlet.com/asiahmohamad/pi009p2/wish/30480819 The concentrated sulfuric acid we use in the laboratory is 98% H2SO4 by mass. calculate the molality and molarity of the acid solution. what is mean by 98% H2SO4 by mass?

]]> 2014-07-09 08:26:47 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480819 Hanis https://padlet.com/asiahmohamad/pi009p2/wish/30480855 Yes madam.Is it PI009P2?

]]> 2014-07-09 08:27:42 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480855 Mohd Hedir&nbsp; https://padlet.com/asiahmohamad/pi009p2/wish/30480894 cant open it through ilearn

]]> 2014-07-09 08:28:22 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480894 Hanis https://padlet.com/asiahmohamad/pi009p2/wish/30480907 Really?Why?

]]> 2014-07-09 08:28:37 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30480907 it is sulphur dioxide https://padlet.com/asiahmohamad/pi009p2/wish/30481019 2014-07-09 08:31:43 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30481019 Anamila https://padlet.com/asiahmohamad/pi009p2/wish/30481032 how to find molality if given information is 4.59M ethanol solution? Density of ethanol (0.9441g/mL

]]> 2014-07-09 08:32:01 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30481032 NURIN ZULAIKHA https://padlet.com/asiahmohamad/pi009p2/wish/30481043 Is it crucial we have to memorise formula polyatomic cation and anion

]]> 2014-07-09 08:32:15 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30481043 muhamad hafiszul aiman https://padlet.com/asiahmohamad/pi009p2/wish/30481301 how many formula that we have to remember on this topic?..

]]> 2014-07-09 08:38:40 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30481301 Taufiq https://padlet.com/asiahmohamad/pi009p2/wish/30489855 Any tips on balancing equation?

]]> 2014-07-09 14:00:38 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30489855 syazana https://padlet.com/asiahmohamad/pi009p2/wish/30579701 madam how can we identify either the actual yeild and theoritical yeild in a question given?

]]> 2014-07-14 03:08:28 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30579701 afiqah https://padlet.com/asiahmohamad/pi009p2/wish/30580104 why is the theoritical yeild of a reaction determined only by the amount of limiting reagent?

]]> 2014-07-14 03:35:18 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30580104 MUHD FARHAN farhan https://padlet.com/asiahmohamad/pi009p2/wish/30674960 FIDA

n(62.9296amu) +(1-n)(64.8278)=63.546

u must find n first

then *100 to get percentage for Cu63

for Cu 65

=100%-percentage of Cu63

]]> 2014-07-16 13:44:54 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30674960 Natikah atikahidris45 https://padlet.com/asiahmohamad/pi009p2/wish/30754643 how to change from empirical formula to molecular formula?

]]> 2014-07-19 04:10:14 UTC https://padlet.com/asiahmohamad/pi009p2/wish/30754643