八年级化学下学期期末考试试卷(含答案6页)

1O16C12Ca40;Fe56202401ABCD2.ABCD3CHOAO2BH2OCCO2DN24ABC21D5ABCD6NaBrO3A5B4C3D17+32AFeO2BFeOCFe2O3DFe3O48ABCD92009127AB2CD10ABCD11ABCD12A.C+O2====CO2B.2CO+O2====2CO2C.2C+O2====2COD.CH4+2O2====CO2+2H2O1314A.B.C.D.15A.B.C.D.16.FeO2Fe3O4()ABCD3A7429B21829C7411D782917XXOHXOPCOOHCH252222)(XACOBCO2CC3O2DC2O318A.B.1X3C.11D.19.R1.6g4.4g3.6gA.RB.RC.RD.20/g522022/g11285A.B.C.98D.0g72521,122334522()______________________423241CH4CH4______23____251226501___ABCD20.4g2715234224281abc2345629123abC6____________________________________11130CaCO3,25g5min,:/min12345/g100g95g92g91.2g91.2g1?2CaCO3(240)CBBBDACCABDBDCBBCBBD21(1)2C(2)N(3)3P2O5(4)Al3+(5)NaCl22232H2+O2====2H2O241D(2)A(3)25CO2+H2O==H2CO3261D21g2712CH4+2O2====CO2+2H2O342124281a:b:c:232H2O2MnO2====2H2O+O245Ca(OH)2+CO2===CaCO3+H2O629124P+5O2====2P2O53(11)301(2)100g-91.2g=8.8g2(8)80%+1