JEE Foundation + Knockout JEE Main 2024 (Easy Installment)
Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.
Bell metal contains 80% copper the mass of bell metal which contains 1.5 x 1020 atoms of copper is
Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.
An exhaustive program for the complete preparation of Physics Chemistry Mathematics English and Aptitude of VITEEE, Adaptive Time Table, Chapterwise Questions, Concepts Flashcards for Quick and Effective Revision, Unlimited Chapter wise Subject wise and Full mock test for enhancing Speed & Accuracy,.
An exhaustive program for the complete preparation of Physics Chemistry Mathematics English & Logical Reasoning of BITSAT exam, Adaptive Time Table, Chapterwise Questions, Concepts Flashcards for Quick and Effective Revision, Unlimited Chapter wise Subject wise and Full mock test for enhancing Speed & Accuracy,.
An exhaustive e-learning program to boost your preparation for the leading engineering entrance exams like:-, BITSAT, VITEEE, MET, SRMJEEE, AEEE, MHT CET, AP EAPCET, TS EAMCET, Unlimited Mock Test for each exam..
An exhaustive program for the complete preparation of Physics Chemistry and Mathematics of MHT-CET exam, Adaptive Time Table, Chapterwise Questions, Concepts Flashcards for Quick and Effective Revision, Unlimited Chapter wise Subject wise and Full mock test for enhancing Speed & Accuracy,.
If 6.022 × 10²³ atoms = 1 mole
Then, moles of Cu = 1.5 x 1020/6.022 × 1023 = 0.00025 moles
Mass of Cu in coin = = 0.00025 mol × 64g/mol = 0.016 g
Therefore 1.5 x 1020 atoms of copper has a mass of 0.016 g.
This 80% of the piece of metal, weight of the mass is 100% = 100/80 x 0.016 = 0.02 g
The piece of metal has a mass of 0.02g