C7H6O forms a HSO3 compound of formula C7H7SO4Na in a 1：1 mo

C7H6O forms a HSO3 compound of formula C7H7SO4Na in a 1：1 mole ratio.
In an experiment it was found that starting from 1.210g of benzaldehyde ,get 2.181g of the hydrogensulphate product.
Calculate the percentage yield
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