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Accurate determination of atomic masses is done with the instrument called as

What will be the mass of one $^{12}C$ atom in $g$?

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Which of the following properties of an element is not variable?

If the equivalent weight of a metal $(M)$ is $x$ and the formula of its oxide is $M_mO_n$,then the atomic weight of $M$ is ......

Match column $-I$ and column $-II$ with the correct molar mass values:
Column $-I$ Column $-II$
$(i)$ Barium sulphate $(a)$ $1877 \ g/mol$
$(ii)$ Magnesium pyrophosphate $(b)$ $235 \ g/mol$
$(iii)$ Ammonium phosphomolybdate $(c)$ $188 \ g/mol$
$(iv)$ Silver chloride $(d)$ $222 \ g/mol$
$(v)$ Silver bromide $(e)$ $143.5 \ g/mol$
$(vi)$ Silver iodide $(f)$ $233 \ g/mol$

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