Reference answers 1.A 2.D 3.B 4.C 5.B6.D 7.A 8.C 9.A 10.B11.C 12.B 13.C 14.D 15.C16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide 17.

2024/05/2421:49:33 education 1607

Reference answers 1.A 2.D 3.B 4.C 5.B6.D 7.A 8.C 9.A 10.B11.C 12.B 13.C 14.D 15.C16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide 17. - DayDayNews

Reference answers 1.A 2.D 3.B 4.C 5.B6.D 7.A 8.C 9.A 10.B11.C 12.B 13.C 14.D 15.C16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide 17. - DayDayNews

Reference answers 1.A 2.D 3.B 4.C 5.B6.D 7.A 8.C 9.A 10.B11.C 12.B 13.C 14.D 15.C16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide 17. - DayDayNews

Reference answers 1.A 2.D 3.B 4.C 5.B6.D 7.A 8.C 9.A 10.B11.C 12.B 13.C 14.D 15.C16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide 17. - DayDayNews

Reference answers 1.A 2.D 3.B 4.C 5.B6.D 7.A 8.C 9.A 10.B11.C 12.B 13.C 14.D 15.C16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide 17. - DayDayNews

Reference answers 1.A 2.D 3.B 4.C 5.B6.D 7.A 8.C 9.A 10.B11.C 12.B 13.C 14.D 15.C16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide 17. - DayDayNews

Reference answer

1.A 2.D 3.B 4.C 5.B

6.D 7.A 8.C 9.A 10.B

11.C 12.B 13.C 14.D 15.C

16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide

17. (1) 2 unchangedCH4+O2+H2

Reference answers 1.A 2.D 3.B 4.C 5.B6.D 7.A 8.C 9.A 10.B11.C 12.B 13.C 14.D 15.C16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide 17. - DayDayNews

CH3OH+H2O

18.I Group (1) Test tube (2) B C 2H2O2

Reference answers 1.A 2.D 3.B 4.C 5.B6.D 7.A 8.C 9.A 10.B11.C 12.B 13.C 14.D 15.C16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide 17. - DayDayNews

2H2O+O2↑

II Group (1) Place the pH test paper on the glass piece, dip a glass rod into a small amount of the liquid to be tested and drop it onto the pH test paper, and compare it with the standard color card and reading. Dilute hydrochloric acid (2) Phenolphthalein red

19. Colorless bubbles and white precipitate b Na2CO3+CaCl2=CaCO3↓+2NaCl absorbed carbon dioxide in the air 1 a

20. (1) Stable or inactive (2) 2 (3) CO liters High (4) Combination reaction d

(5) Cu2 (OH) 2CO3

Reference answers 1.A 2.D 3.B 4.C 5.B6.D 7.A 8.C 9.A 10.B11.C 12.B 13.C 14.D 15.C16. (1) Trace amount (2) 1:3 65:4 (3)b (4) The mass fraction of zinc element in zinc carbonate is lower than zinc oxide 17. - DayDayNews

2CuO+H2O+CO2↑

21. (1) Strong (2) FeSO4

(3) Solution: Let the mass of reduced iron powder required be X.

Fe+CuSO4=FeSO4+Cu

56 64

X 1000g Answer: The mass of reduced iron powder is 168g.

(4) 1.596g


education Category Latest News

In order to thoroughly implement the "double reduction" policy and the national, provincial and municipal documents and regulations on the treatment of illegal paid make-up lessons for in-service teachers, promote the implementation of the relevant work deployment requirements of - DayDayNews

In order to thoroughly implement the "double reduction" policy and the national, provincial and municipal documents and regulations on the treatment of illegal paid make-up lessons for in-service teachers, promote the implementation of the relevant work deployment requirements of

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