Question

please explain each steps

O How many grams of white petrolatum should be mixed with 250 g of 5% and 750 ointments to prepare a 10% ointment? of 15% zinc oxide

Answer 1

5x 2 50 = 12 50 I5 X 750 = 11 2 50 TO TAL : 1000 12,500 12, 500 1000 = 12.5 % 2une onude ovntment Nim 4 of a munture of 5%. and 151. ointments. 1000 JO pahdn 4 12.51. mwnkuhe 12.5% 10% 2.5 jahta of whNte pe Aholeum 0% or 4:1 helakuve amount : 10:2.5 4 pahtn 1000g 1 pares 2 50 9 Am. Hence, 2 50 ghams of whohe peaholenm monld he moned irv th 250 g of 51. and 730 15 1. 2ine nWde ovntament to fhefahe a 10 1. ovntment. Whe te pedholeum monid

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