Question

cosider a reaction cu+2 +2e- --- cu find the nos. of coloumbs required to deposit 5g of cu

Answer 1

Explanation:

9. A school organized a competition of making and decorating pen holders in the shape of a cylinder by making its base and its curved surface area with cardboard. Each pen holder is supposed to have a radius of 3.5 cm and height 10 cm. How much cardboard does the school need if 30 students are participating in the competition