![Suppose a pure Si crystal has 5 × 10^28 atoms m^-3 . it is doped by 1 ppm concentration of pentavalent As. Calculate the number of electrons and holes. Given that n1 = 1.5 × 10^16m^-3 . Suppose a pure Si crystal has 5 × 10^28 atoms m^-3 . it is doped by 1 ppm concentration of pentavalent As. Calculate the number of electrons and holes. Given that n1 = 1.5 × 10^16m^-3 .](https://haygot.s3.amazonaws.com/questions/2002130_1289582_ans_0a2a21fa883f480a8f1baf8829e97f49.jpg)
Suppose a pure Si crystal has 5 × 10^28 atoms m^-3 . it is doped by 1 ppm concentration of pentavalent As. Calculate the number of electrons and holes. Given that n1 = 1.5 × 10^16m^-3 .
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![Phosphotungstic Acid Hydrate, 99.995% (Trace Metals Basis) (Purity excludes up to 300 ppm Si), 10g - Chemsavers, Inc. Phosphotungstic Acid Hydrate, 99.995% (Trace Metals Basis) (Purity excludes up to 300 ppm Si), 10g - Chemsavers, Inc.](https://cdn11.bigcommerce.com/s-ityfqr2/images/stencil/1280x1280/products/24752/3349/Phosphotungstic__89738.1609946462.jpg?c=2)
Phosphotungstic Acid Hydrate, 99.995% (Trace Metals Basis) (Purity excludes up to 300 ppm Si), 10g - Chemsavers, Inc.
![▷ La Concentración. max. permisible en ppm de Pb es 0.035 ppm. Si toma una muestra de 850 g de agua ¿Cuál es la cantidad de plomo? ▷ La Concentración. max. permisible en ppm de Pb es 0.035 ppm. Si toma una muestra de 850 g de agua ¿Cuál es la cantidad de plomo?](https://i.ytimg.com/vi/mXvZmH55jHg/maxresdefault.jpg)
▷ La Concentración. max. permisible en ppm de Pb es 0.035 ppm. Si toma una muestra de 850 g de agua ¿Cuál es la cantidad de plomo?
![SOLVED: ayuda, esto es de química a) Calcula las ppm de mercurio. Si en 4.3 litros de agua de un rio hay disueltos 0.003g b)Una pasta de dientes tiene 0.004g de floruro SOLVED: ayuda, esto es de química a) Calcula las ppm de mercurio. Si en 4.3 litros de agua de un rio hay disueltos 0.003g b)Una pasta de dientes tiene 0.004g de floruro](https://cdn.numerade.com/ask_images/39c967cabcaf48ecb0f21f74a3754f53.jpg)
SOLVED: ayuda, esto es de química a) Calcula las ppm de mercurio. Si en 4.3 litros de agua de un rio hay disueltos 0.003g b)Una pasta de dientes tiene 0.004g de floruro
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