Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
please explain me mole concept.
a group of 6.022 * 1023
molecules/atoms/ions is reffered as one mole of substance..it is the basic unit of measurement in chemistry..
Atoms and molecules are extremely small insize and their numbers in even a small amountof any substance is really very large. To handlesuch large numbers, a unit of similarmagnitude is required.Just as we denote one dozen for 12 items,score for 20 items, gross for 144 items, weuse the idea of mole to count entities at themicroscopic level (i.e. atoms/molecules/particles, electrons, ions, etc).In SI system, mole (symbol, mol) wasintroduced as seventh base quantity for theamount of a substance.One mole is the amount of a substancethat contains as many particles or entitiesas there are atoms in exactly 12 g (or 0.012kg) of the 12C isotope. It may be emphasisedthat the mole of a substance always containthe same number of entities, no matter whatthe substance may be. In order to determinethis number precisely, the mass of a carbon?12 atom was determined by a massspectrometer and found to be equal to1.992648 10?23 g. Knowing that one mole ofcarbon weighs 12 g, the number of atoms in itis equal to :1223 1212 g/mol C1.992648×10− g/ Catom= 6.0221367 ×1023 atoms/mol..The mass of one moleof a substance in grams is called itsmolar mass..
plz approve my answer
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !