What equals the molar mass of an element? a)The atomic mass of the element expressed in grams

b)The atomic number of the element expressed in grams

c)The mass number of the most common isotope of the element expressed in grams

d)None of the above

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so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer