5. The relative atomic mass of elements X, Y and Z are 12, 16 and 24 respectively. a) How much is an atom of Z heavier than an atom of Y
b) How many atoms of X will have the same mass as the sum of 3 atoms of Y and 2 atoms
of Z?

6. Adrenaline is produced by the adrenal gland. Adrenaline has the formula C9H13NOx. If its RMM is 183, determine the value of x. Then, write the molecular formula of adrenaline.
[Relative atomic mass: H=1; C=12; N=14; O=16]

7. The relative formula mass of X3(PO4)2 is 310. Determine the relative atomic mass of element X.
[Relative atomic mass: O=16; P=31]

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