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1 mol ----- 6,022 x 1023
entidades (partículas – átomos – moléculas)
6,022 x 1023
(Equivale a 602 mil trillones)
2 mol de moléculas de H2O ----- 1,2 x 1024
moléculas.
2,5 mol de moléculas de H2O ---- 1,5 x 1024
moléculas.
Masa molar 𝑀
̅
Na H C O3
𝑀
̅ NaHCO3 = 22,99 + 1,00794 + 12,011 + (15,999 x 3)
𝑀
̅ NaHCO3 = 84,00594 g/mol
La masa molar me indica cuántos gramos de una sustancia
hay en un mol.
1 mol NaHCO3 ------ 84,00594 g
2 mol NaHCO3 ------ 168,01188 g
Cuántos gramos hay en 3,75 mol de NaHCO3
masa= 3,75 x 84,00594 = 315,022 g
Reactivos Productos
P4 + 3 O2  2 P2O3
Fósforo Dioxígeno Trióxido de difósforo
1mol de Fósforo reacciona con
3 mol de dioxígeno para
producir 2 mol de Trióxido de
difósforo.
Ecuación Química
2 C8H18 (l) + 25 O2 (g)  16 CO2 (g) + 18 H2O (g)
OCTANO DIOXÍGENO DIÓXIDO DE CARBONO AGUA
Relaciones estequiométricas
Plantea la relación cuantitativa entre reactivos, entre productos o
entre reactivos y productos
 2 mol C8H18 16 mol CO2
 2 mol C8H18 18 mol H2O
 25 mol O2 16 mol CO2
 25 mol O2 18 mol H2O
 2 mol C8H18 25 mol O2
 16 mol CO2 18 mol H2O

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Repaso de actividades

  • 1. 1 mol ----- 6,022 x 1023 entidades (partículas – átomos – moléculas) 6,022 x 1023 (Equivale a 602 mil trillones) 2 mol de moléculas de H2O ----- 1,2 x 1024 moléculas. 2,5 mol de moléculas de H2O ---- 1,5 x 1024 moléculas. Masa molar 𝑀 ̅ Na H C O3 𝑀 ̅ NaHCO3 = 22,99 + 1,00794 + 12,011 + (15,999 x 3) 𝑀 ̅ NaHCO3 = 84,00594 g/mol La masa molar me indica cuántos gramos de una sustancia hay en un mol. 1 mol NaHCO3 ------ 84,00594 g 2 mol NaHCO3 ------ 168,01188 g Cuántos gramos hay en 3,75 mol de NaHCO3 masa= 3,75 x 84,00594 = 315,022 g Reactivos Productos P4 + 3 O2  2 P2O3 Fósforo Dioxígeno Trióxido de difósforo 1mol de Fósforo reacciona con 3 mol de dioxígeno para producir 2 mol de Trióxido de difósforo.
  • 2. Ecuación Química 2 C8H18 (l) + 25 O2 (g)  16 CO2 (g) + 18 H2O (g) OCTANO DIOXÍGENO DIÓXIDO DE CARBONO AGUA Relaciones estequiométricas Plantea la relación cuantitativa entre reactivos, entre productos o entre reactivos y productos  2 mol C8H18 16 mol CO2  2 mol C8H18 18 mol H2O  25 mol O2 16 mol CO2  25 mol O2 18 mol H2O  2 mol C8H18 25 mol O2  16 mol CO2 18 mol H2O