The mass of element q found in 1.00 mole of each of four compounds is 38.0 grams, 57.0 grams, 76.0 grams and 114 grams.

The question; The mass of element Q found in 1.00 mole of each of four different compounds is 38.0 grams, 57.0 grams, 76.0 grams, and 114 grams, respectively. A possible atomic weight of Q is;

Answer;

Atomic weight of Q = 19 g

Solution and explanation;  

A possible atomic mass of Q has to be a factor of 38, 57, 76, and 114.

Because the number of atoms of Q in any compound must be a whole number.

-Finding a greatest common Divider of 38, 57, 76, and 114

38 = 2(19)  

57 = 3(19)  

76 = 4(19)  

114 = 6(19)

Thus; the greatest common divider is 19

Hence, the possible atomic mass of Q is 19 g

c. 4.54 x 10–12 j happens to be correct

yes the answer is total mass in unchanged   : )