a BaCO3 + b Cd(CH3COO)2 + c H3BO3 = d Ba2Cd(BO3)2 + f H2O + g CO2 + h CH3COCH3 Step 2: Create a System of Equations Create an equation for each element (Ba, C, O, Cd, H, B) where each term represents the number of ato...
(4)假设2成立,其离子方程式为 ;【定量探究】(5)乙同学进一步探究假设3中固体的组成:若所取蓝绿色固体质量为54.2g,实验结束后装置B的质量增加5.4g,C中的产生沉淀的质量为20g.则该蓝绿色固体的化学式为 .已知:(1) (2)R-CN H2O H+R-COOH以甲苯为唯一的有机原料(溶剂和催化剂、无机物可以任选),合成:...
BaCO3 + Cd(CH3COO)2 + H3BO3 = Ba2Cd(BO3)2 + H2O + CO2 + CH3COCH3 FeO + Cl = Cl2Fe + O2 近期平衡的方程式練習 Pb(CH3COO)2 - + + HCl - + = PbCl2 - + + CH4COO - + 反应物产品 Pb 1 1 ✔️ C 4 2 ❌ H 7 4 ❌ O 4 2 ❌ Cl 1 2 ❌计算...
B、由CH3(CH2)2CH3(g)+13/2O2(g)=4CO2(g)+5H2O(g)△H=-2658 kJ?mol-1,可知正丁烷的标准燃烧热为:-2658 kJ?mol-1 C、某温度下,pH=11的NH3?H2O和pH=1的盐酸等体积混合后(不考虑混合后溶液体积的变化)恰好完全反应,反应后的溶液中NH4+、NH3?H2O ...
下列化学方程式或离子方程式中,正确的是( )A.氢氧化铜溶于醋酸溶液中:Cu(OH)2+2H+=Cu2++2H2OB.乙醛的银镜反应:CH3CHO+[Ag(NH3)2]++OH--→CH3COO-+NH4++NH3+Ag↓+H2OC.苯酚钠溶液中通入二
c = 1 (H2O) d = 1 (CH3COOC6H4COONa) Step 4: Substitute Coefficients and Verify Result Count the number of atoms of each element on each side of the equation and verify that all elements and electrons (if there are charges/ions) are balanced. ...