Rakhi- 92.5%

Rohit- 92.5%

Gangesh Tiwari - 92.5% - UP Board Class 10 - 2023

Rakhi Devi - 92.5% - UP Board Class 10 - 2023

Khushaboo Chauhan - 92.5% - UP Board Class 10 - 2023

How many ml. of H_(2)SO_(4) density 1.8 g/mL containing 92.5% by volume of H_(2)SO_(4) should be added to 1 litre of 40% solution of H_(2)SO_(4) (density 1.30 g/mL) in order to prepare 50% solution of H_(2)SO_(4) (density 1.4 g/mL) ?

Two stable isotopes of lithium ._3^6Li and ._3^7Li have respective abundances of 7.5% and 92.5% . These isotopes have masses 6.0152 u and 7.016004 u respectively. Find the atomic weight of lithium

(a) Two stable isotope of ._3Li^6 and ._3Li^7 have respective abundances of 7.5% and 92.5% . These isotopes have masses 6.01512 and 7.01600 u respectively. Find the atomic weight of lithium. (b) Boron has two stable isotopes ._5B^(10) and ._5B^(11) . Their respective masses are 10.01294 u and 11.00931u, and the atomic weight of boron is 10.81u. Find the abundaces of ._5B^(10) and ._5B^(11) .