Respuesta :

 All you have to do is take the number of moles you have a multiply by the molar mass. The number of moles is given. To find the molar mass, add the atomic weights that make up your molecule.

Four hydrogen = Four amu (4*1)
Two carbon = 24 amu (2*12)
Two Oxygen = 32 (2*16)

Summing these, we have a molar mass of 60 grams/mole.

Multiply this by the number of moles and we get:

60(g/mol) * 1.26*10^-4 mol = .00756 g.

A mole is a unit of measurement for very small particles which is equal to Avogadro's constant. The value of the given substance is 0.0075 g.

Mole concept:

A mole is a unit of measurement for very small particles which is equal to Avogadro's constant.

From the formula,

[tex]n = \dfrac wm[/tex]

Where,

[tex]n[/tex] - number of moles = [tex]\bold {1.26\times 10^{-4}}[/tex] moles

[tex]w[/tex] - mass =?

[tex]m[/tex] - molar mass = 60 g/mol

Put the values in the formula,

[tex]\bold {1.26\times 10^{-4}} =\dfrac w{60}\\\\w = 0.00756 \rm \ g[/tex]

Therefore, the value of the given substance is 0.0075 g.

Learn more about Mole concept:

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