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越详细越好...

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越详细越好... HSO3- 化合物A（C12H17Cl）,与热的NaOH-乙醇溶液反应得到B(C12H16),B可使Br2/CCl4溶液褪色.B与臭氧反应后再用锌粉还原得到C(C7H6O)和D(C5H10O).CdeH-NMR为δ=10.02ppm（1H,单峰）,δ=7.56~7.87ppm（5H,多重峰）；D的H-NMR 为什么向H2SO3=(HSO3-)+H+加I2,C（h2so3）/C（hso3-）增大 一道化学选择溶液中含有NH4+、F-、HSO3-、K+等离子.向其中加入少量NaClO后,溶液中离子数目肯定增加的是A．F- B．ClO- C．HSO3- D．NH4+ NaHSO3溶液的pH7,下列说法错误的是（多选):A.HSO3-的电离作用大于HSO3-的水解作用C.HCO3-的电离作用大于HCO3-的水解作用 对于0.1mol/LNa2SO3溶液,正确的是A.升高温度,溶液pH升高B.加入少量NaOH固体,c（SO32-）与c（Na）均增大C.c（Na+）=c（SO32-）+c（HSO3-）+2c（H2SO3）D.c（Na+）+c（H+）=2c（SO32-）+2c（HSO3-）+c（OH-）双选 many forms of life___ectinct many years ago.A became B died C had to D used to Electricity,like other forms of ___,has greatly increased in price.A、strength B、force C、power D、energy 已知 0.2 mol/L NaHSO3 溶液中的微粒有如下关系：c(Na+)>c(HSO3+)>c(SO3 2+)>c(H2SO3),则该溶液呈现（ ）A,酸性 B,碱性 C,中性 D,无法判断 已知常温下KHCO3溶液的pHc(HSO3-)>c(SO32-)>c(H2SO3)B:c(K+)>c(SO32-)>c(SO42-)>c(HSO3-)>c(H+)>c(OH-)C:c(K+)=c(HSO3-)+2c(SO32-)+2c(SO42-)D:c(K+)+c(H+)=c(HSO3-)+c(SO32-)+c(SO42-)+c(OH-)对不起啊……打错了。是KHSO3 A small bridge _______the two parts of the building.A.forms B.breaks C.runs along D.connects选哪个?能否再顺便翻译一下句子?感激不尽! 下列各组离子,在强碱性溶液中可以大量共存的是( ) A、K＋ Na＋ HSO3- Cl- B、Na＋ Ba2＋ AlO2－ NO3－ C、下列各组离子,在强碱性溶液中可以大量共存的是( )A、K＋ Na＋ HSO3- Cl- B、Na＋ Ba2＋ AlO2－ NO3 Question 33 .Glycerol forms the backbone ofAnswer A.triglycerides.B.polysaccharides and nucleic acids.C.nucleic acids.D.polypeptides.E.triglycerides and phospholipids. There are different forms of energy,_____come from sun.A.that B.most of that C.most of them D.most of which energy power force strength用法Electricity ,like other forms of ___has greatly increased in price.A .strength B.force C.power D.energy Electricity,like other forms of ______,has greatly increased in price in recent years.A.pressure B.force C.strength D.energy We keep in touch with each other____ letters and telephones.A. by B in form of C in forms D in the form of要详解!