How much \( \mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2} \), in mg, ...

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How much \( \mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2} \), in mg, must be present in
P \( 50 \mathrm{ml}(\mathrm{d}=1 \mathrm{~g} / \mathrm{mL}) \) of a solution with \( 2.35 \mathrm{ppm} \) of

W. \( \mathrm{Ca} \) ?
(A) 0.1175
(B) 770.8
(C) 4.7
(D) 0.48
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