Hallar el peso molecular de las siguientes sustancias. NaCl HNO 3 KI Na 2 S Ca(OH) 2 H 2 SO 4 KCL CuSO 4 CH 4 LiOH

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Explanation:

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Para calcular el peso molecular de cualquier sustancia o compuesto, necesitamos los pesos atómicos de los elementos que componen la molécula. Iremos por parte.

Para cada compuesto, escribiremos el peso atómico necesario, y luego calcularemos el peso molecular

a) NaCl

Na: 23 g/mol;  Cl: 35.5 g/mol

PM = 23 + 35.5

PM = 58.5 g/mol

b) HNO₃

H: 1 g/mol; N: 14 g/mol; O = 16 g/mol

PM = 1 + 14 + 3(16)

PM = 63 g/mol

c) KI

K: 39.1 g/mol; I: 126.9 g/mol

PM = 39.1 + 126.9

PM = 166 g/mol

d) Na₂S

Na: 23 g/mol;  S: 32 g/mol

PM = 2(23) + 32

PM = 78 g/mol

e) Ca(OH)₂

Ca: 40 g/mol;  O: 16 g/mol;  H: 1 g/mol

PM = 40 + 2(16) + 2(1)

PM = 75 g/mol

f) H₂SO₄:

H: 1 g/mol;  S = 32 g/mol;  O = 16 g/mol

PM = 2(1) + 32 + 4(16)

PM = 98 g/mol

g) KCl

K: 39 g/mol;  Cl: 35.5 g/mol

PM = 39 + 35.5

PM = 74.5 g/mol

h) CuSO₄

Cu: 63.55 g/mol;  S: 32 g/mol;  O = 16 g/mol

PM = 63.55 + 32 + 4(16)

PM = 159.55 g/mol

i) CH₄

C: 12 g/mol;  H: 1 g/mol

PM = 12 + 4(1)

PM = 16 g/mol

j) LiOH

Li: 6.94 g/mol;  O: 16 g/mol;  H: 1 g/mol

PM = 6.94 + 16 + 1

PM = 23.94 g/mol

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