Question

Q 4. The value of atomic masses of all elements 00:33:15
given by considering Carbon-12 isotope as
standard. 1 amu or nu is specified as 1/12 th the
mass of one atom of carbon-12 isotope. Mass of all
elements is given relative to this standard, hence
they are called relative atomic masses.
Consider three hypothetical e' nents P,Q and R
with atomic masses X,Y and Z. pectively. If the
standard element is taken to be Q, instead of
carbon-12, What would be the relative masses of P
and R respectively?
a.
N
X Z
&
Y Y
Y Z
&
X
Y
X
Y
&
Y Z
Y Y
&
X Z​

Answer 1

Answer:

your question is not clear

Answer 2

Given: Three hypothetical elements P,Q and R  with atomic masses X,Y and Z

The standard element is taken to be Q

To Find: relative masses of P  and R respectively

Step by step Explanation:

If Carbon-12 was reference element, then;

$C^{12} = 12 u\\\frac{1}{12} of C^{12} = 1 u$

Hydrogen = 1u= one atom of Hydrogen is equal to weight of (1/12) of Carbon-12.

Likewise, if the standard element is taken to be Q (atomic mass Y), Then;

$Q^{Y}= Y u\\ \frac{1}{Y} of Q= 1 u$

Relative mass of P;

$P = X \times \frac{1}{Y} \\P= \frac{X}{Y} u$

Relative mass of R;

$R = Z \times \frac{1}{Y} \\R= \frac{Z}{Y} u$

Therefore, the relative masses of P and R (if Q is the standard element) would be X/Y and Z/Y respectively.