ninhydrin having molecular formula C9H6O4,is commonly used by forensic scientists to detect and analyze fingerprints.The number of molecules in 7.4g of ninhydrin is......
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Molecular weight or mass of NinHydrin = 9 * 12 + 6 * 1 + 16 * 4
= 178
As per Avogadro's law we have that one mole ( 178 gms) of NonHydrin contains N = avogadro number ie., 6.023 * 10²³ molecules.
so number of molecules in 7.4 gms are: 6.023 * 10²³ * 7.4 / 178
= 2.502 * 10²²
= 178
As per Avogadro's law we have that one mole ( 178 gms) of NonHydrin contains N = avogadro number ie., 6.023 * 10²³ molecules.
so number of molecules in 7.4 gms are: 6.023 * 10²³ * 7.4 / 178
= 2.502 * 10²²
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Answer:
2.502 * 10²²
Explanation:
Molecular weight or mass of NinHydrin = 9 * 12 + 6 * 1 + 16 * 4
= 178
As per Avogadro's law we have that one mole ( 178 gms) of NonHydrin contains N = avogadro number ie., 6.023 * 10²³ molecules.
so number of molecules in 7.4 gms are: 6.023 * 10²³ * 7.4 / 178
= 2.502 * 10²²
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