Question

calculate the formula unit mass of mgo and cacl2​

Answer 1

The formula unit mass of MgO is 40 g and CaCl2 is 111 g.

Explanation:

Formula unit mass is defined as the sum of the mass of all the atoms each multiplied its atomic masses that are present in the empirical formula of a compound. It is expressed in amu.

We know that:

a) CaCl2

Atomic mass of calcium = 40 amu

Atomic mass of chlorine = 35.5 amu

Formula mass of CaCl2 = ( 1 x 40 ) + ( 2 x 35.5)  = 40 +71 = 111 g

b) MgO

Atomic mass of Mg = 24 amu

Atomic mass of O = 16 amu

Formula mass of MgO = ( 1 x 24) + ( 1 x 16) = 24 + 16 = 40 g

Thus the formula unit mass of MgO is 40 g and CaCl2 is 111 g.

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Calculate the formula unit mass of NaCl and CaCl2 ?

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Answer 2

Answer:

mgo is 40 amu and cacl2 is 111 amu