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Measurement of Matter — Science STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9ScienceMeasurement of Matter3 Marks
Question
Molecular formula – $KNO_3$
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Answer

Molecular mass of $KNO_3 (M)$
$= (Atomic mass of K) x 1 + (Atomic mass of N) x 1 + (Atomic mass of O) x 3$
$= (39 x 1) + (14 x 1) + (16 x 3)$
$= 39 + 14 + 48$
$= 101$
Molecular mass of $KNO_3 (M) = 101$

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