跪求五十道高一化学计算题！要简单的不要太难！不要选择填空题！要计算题！把过程答案一起，谢谢啦！ 在哪里可以找到高一化学的计算题及解析答案，要很多道，答案过程...
\u5c0f\u5b66\u7684600\u9053\u8ba1\u7b97\u9898\u4e0d\u8981\u592a\u96be\u4e5f\u4e0d\u8981\u8fc7\u4e8e\u7b80\u5355600\u9053\u8ba1\u7b97\u9898 \u8981\u7b54\u6848\uff01\uff01\u516d\u5e74\u7ea7\u8ba1\u7b97\u9898
7/19 + 12/19 \u00d7 5/6
1/4 + 3/4 \u00f7 2/3
8/7 \u00d7 21/16 + 1/2
101 \u00d7 1/5 \u2013 1/5 \u00d7 21
50\uff0b160\u00f740 \uff0858+370\uff09\u00f7\uff0864-45\uff09
120-144\u00f718+35
347+45\u00d72-4160\u00f752
\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
95\u00f7\uff0864-45\uff09
178-145\u00f75\u00d76+42 420+580-64\u00d721\u00f728
812-700\u00f7\uff089+31\u00d711\uff09 \uff08136+64\uff09\u00d7\uff0865-345\u00f723\uff09
85+14\u00d7\uff0814+208\u00f726\uff09
\uff08284+16\uff09\u00d7\uff08512-8208\u00f718\uff09
120-36\u00d74\u00f718+35
3/7 \u00d7 49/9 - 4/3
8/9 \u00d7 15/36 + 1/27
12\u00d7 5/6 \u2013 2/9 \u00d73
8\u00d7 5/4 + 1/4
6\u00f7 3/8 \u2013 3/8 \u00f76
4/7 \u00d7 5/9 + 3/7 \u00d7 5/9
5/2 -\uff08 3/2 + 4/5 \uff09
7/8 + \uff08 1/8 + 1/9 \uff09
9 \u00d7 5/6 + 5/6
3/4 \u00d7 8/9 - 1/3
7 \u00d7 5/49 + 3/14
6 \u00d7\uff08 1/2 + 2/3 \uff09
8 \u00d7 4/5 + 8 \u00d7 11/5
31 \u00d7 5/6 \u2013 5/6
9/7 - \uff08 2/7 \u2013 10/21 \uff09
5/9 \u00d7 18 \u2013 14 \u00d7 2/7
4/5 \u00d7 25/16 + 2/3 \u00d7 3/4
14 \u00d7 8/7 \u2013 5/6 \u00d7 12/15
17/32 \u2013 3/4 \u00d7 9/24
3 \u00d7 2/9 + 1/3
5/7 \u00d7 3/25 + 3/7
3/14 \u00d7\u00d7 2/3 + 1/6
1/5 \u00d7 2/3 + 5/6
9/22 + 1/11 \u00f7 1/2
5/3 \u00d7 11/5 + 4/3
45 \u00d7 2/3 + 1/3 \u00d7 15
7/19 + 12/19 \u00d7 5/6
1/4 + 3/4 \u00f7 2/3
8/7 \u00d7 21/16 + 1/2
101 \u00d7 1/5 \u2013 1/5 \u00d7 21
50\uff0b160\u00f740 \uff0858+370\uff09\u00f7\uff0864-45\uff09
120-144\u00f718+35
347+45\u00d72-4160\u00f752
\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
95\u00f7\uff0864-45\uff09
178-145\u00f75\u00d76+42 420+580-64\u00d721\u00f728
812-700\u00f7\uff089+31\u00d711\uff09 \uff08136+64\uff09\u00d7\uff0865-345\u00f723\uff09
85+14\u00d7\uff0814+208\u00f726\uff09
\uff08284+16\uff09\u00d7\uff08512-8208\u00f718\uff09
120-36\u00d74\u00f718+35
\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
(6.8-6.8\u00d70.55)\u00f78.5
0.12\u00d7 4.8\u00f70.12\u00d74.8
3.2\u00d71.5+2.5\uff09\u00f71.6
7.2\u00f70.8-1.2\u00d75= 6-1.19\u00d73-0.43=
6.5\u00d7\uff084.8-1.2\u00d74\uff09= 0.68\u00d71.9+0.32\u00d71.9
10.15-10.75\u00d70.4-5.7
5.8\u00d7\uff083.87-0.13\uff09+4.2\u00d73.74
32.52-\uff086+9.728\u00f73.2\uff09\u00d72.5
7.1-5.6\uff09\u00d70.9-1.15] \u00f72.5
12\u00d76\u00f7\uff0812-7.2\uff09-6 \uff084\uff0912\u00d76\u00f77.2-6
45 \u00d7 2/3 + 1/3 \u00d7 15
7/19 + 12/19 \u00d7 5/6
1/4 + 3/4 \u00f7 2/3
8/7 \u00d7 21/16 + 1/2
101 \u00d7 1/5 \u2013 1/5 \u00d7 21
50\uff0b160\u00f740 \uff0858+370\uff09\u00f7\uff0864-45\uff09
120-144\u00f718+35
347+45\u00d72-4160\u00f752
\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
95\u00f7\uff0864-45\uff09
178-145\u00f75\u00d76+42 420+580-64\u00d721\u00f728
812-700\u00f7\uff089+31\u00d711\uff09 \uff08136+64\uff09\u00d7\uff0865-345\u00f723\uff09
85+14\u00d7\uff0814+208\u00f726\uff09
\uff08284+16\uff09\u00d7\uff08512-8208\u00f718
1.125*3+125*5+25*3+25
2.9999*3+101*11*(101-92)
3.(23/4-3/4)*(3*6+2)
4. 3/7 \u00d7 49/9 - 4/3
5. 8/9 \u00d7 15/36 + 1/27
6. 12\u00d7 5/6 \u2013 2/9 \u00d73
7. 8\u00d7 5/4 + 1/4
8. 6\u00f7 3/8 \u2013 3/8 \u00f76
9. 4/7 \u00d7 5/9 + 3/7 \u00d7 5/9
10. 5/2 -\uff08 3/2 + 4/5 \uff09
11. 7/8 + \uff08 1/8 + 1/9 \uff09
12. 9 \u00d7 5/6 + 5/6
13. 3/4 \u00d7 8/9 - 1/3
14. 7 \u00d7 5/49 + 3/14
15. 6 \u00d7\uff08 1/2 + 2/3 \uff09
16. 8 \u00d7 4/5 + 8 \u00d7 11/5
17. 31 \u00d7 5/6 \u2013 5/6
18. 9/7 - \uff08 2/7 \u2013 10/21 \uff09
19. 5/9 \u00d7 18 \u2013 14 \u00d7 2/7
20. 4/5 \u00d7 25/16 + 2/3 \u00d7 3/4
21. 14 \u00d7 8/7 \u2013 5/6 \u00d7 12/15
22. 17/32 \u2013 3/4 \u00d7 9/24
23. 3 \u00d7 2/9 + 1/3
24. 5/7 \u00d7 3/25 + 3/7
25. 3/14 \u00d7\u00d7 2/3 + 1/6
26. 1/5 \u00d7 2/3 + 5/6
27. 9/22 + 1/11 \u00f7 1/2
28. 5/3 \u00d7 11/5 + 4/3
29. 45 \u00d7 2/3 + 1/3 \u00d7 15
30. 7/19 + 12/19 \u00d7 5/6
31. 1/4 + 3/4 \u00f7 2/3
32. 8/7 \u00d7 21/16 + 1/2
33. 101 \u00d7 1/5 \u2013 1/5 \u00d7 21
34.50\uff0b160\u00f740
35.120-144\u00f718+35
36.347+45\u00d72-4160\u00f752
37\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
38.95\u00f7\uff0864-45\uff09
39.178-145\u00f75\u00d76+42
40.812-700\u00f7\uff089+31\u00d711\uff09
41.85+14\u00d7\uff0814+208\u00f726\uff09
43.120-36\u00d74\u00f718+35
44.\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
45.(6.8-6.8\u00d70.55)\u00f78.5
46.0.12\u00d7 4.8\u00f70.12\u00d74.8
47.\uff083.2\u00d71.5+2.5\uff09\u00f71.6
48.6-1.6\u00f74= 5.38+7.85-5.37=
49.7.2\u00f70.8-1.2\u00d75= 6-1.19\u00d73-0.43=
50.6.5\u00d7\uff084.8-1.2\u00d74\uff09=
51.5.8\u00d7\uff083.87-0.13\uff09+4.2\u00d73.74
52.32.52-\uff086+9.728\u00f73.2\uff09\u00d72.5
53.[\uff087.1-5.6\uff09\u00d70.9-1.15] \u00f72.5
54.5.4\u00f7[2.6\u00d7\uff083.7-2.9\uff09+0.62]
55.12\u00d76\u00f7\uff0812-7.2\uff09-6
56.12\u00d76\u00f77.2-6
57.0.68\u00d71.9+0.32\u00d71.9
58.58+370\uff09\u00f7\uff0864-45\uff09
59.420+580-64\u00d721\u00f728
60.136+6\u00d7\uff0865-345\u00f723\uff09
15-10.75\u00d70.4-5.7
62.18.1\uff0b\uff083\uff0d0.299\u00f70.23\uff09\u00d71
63.(6.8-6.8\u00d70.55)\u00f78.5
64.0.12\u00d7 4.8\u00f70.12\u00d74.8
65.\uff083.2\u00d71.5+2.5\uff09\u00f71.6
66.3.2\u00d76+\uff081.5+2.5\uff09\u00f71.6
67.0.68\u00d71.9+0.32\u00d71.9
68.10.15-10.75\u00d70.4-5.7
69.5.8\u00d7\uff083.87-0.13\uff09+4.2\u00d73.74
70.32.52-\uff086+9.728\u00f73.2\uff09\u00d72.5
71.[\uff087.1-5.6\uff09\u00d70.9-1.15] \u00f72.5
72.5.4\u00f7[2.6\u00d7\uff083.7-2.9\uff09+0.62]
73.12\u00d76\u00f7\uff0812-7.2\uff09-6
74.12\u00d76\u00f77.2-6
75.33.02\uff0d\uff08148.4\uff0d90.85\uff09\u00f72.5
1) 76.(25%-695%-12%)*36
77./4*3/5+3/4*2/5
78.1-1/4+8/9/7/9
79.+1/6/3/24+2/21
80./15*3/5
81.3/4/9/10-1/6
82./3+1/2)/5/6-1/3]/1/7
83./5+3/5/2+3/4
84.(2-2/3/1/2)]*2/5
85.+5268.32-2569
86.3+456-52*8
87.5%+6325
88./2+1/3+1/4
2) 89+456-78
3) 5%+. 3/7 \u00d7 49/9 - 4/3
4) 9 \u00d7 15/36 + 1/27
5) 2\u00d7 5/6 \u2013 2/9 \u00d73
6) 3\u00d7 5/4 + 1/4
7) 94\u00f7 3/8 \u2013 3/8 \u00f76
8) 95/7 \u00d7 5/9 + 3/7 \u00d7 5/9
9) 6/2 -\uff08 3/2 + 4/5 \uff09
10) 8 + \uff08 1/8 + 1/9 \uff09
11) 8 \u00d7 5/6 + 5/6
12) 1/4 \u00d7 8/9 - 1/3
13) 10 \u00d7 5/49 + 3/14
14) 1.5 \u00d7\uff08 1/2 + 2/3 \uff09
15) 2\uff0f9 \u00d7 4/5 + 8 \u00d7 11/5
16) 3.1 \u00d7 5/6 \u2013 5/6
17) 4/7 - \uff08 2/7 \u2013 10/21 \uff09
18) 19 \u00d7 18 \u2013 14 \u00d7 2/7
19) 5 \u00d7 25/16 + 2/3 \u00d7 3/4
20) 4 \u00d7 8/7 \u2013 5/6 \u00d7 12/15
21) 7/32 \u2013 3/4 \u00d7 9/24
22) 1\u3001 2/3\u00f71/2\uff0d1/4\u00d72/5
2\u3001 2\uff0d6/13\u00f79/26\uff0d2/3
3\u3001 2/9\uff0b1/2\u00f74/5\uff0b3/8
4\u3001 10\u00f75/9\uff0b1/6\u00d74
5\u3001 1/2\u00d72/5\uff0b9/10\u00f79/20
6\u3001 5/9\u00d73/10\uff0b2/7\u00f72/5
7\u3001 1/2\uff0b1/4\u00d74/5\uff0d1/8
8\u3001 3/4\u00d75/7\u00d74/3\uff0d1/2
9\u3001 23\uff0d8/9\u00d71/27\u00f71/27
10\u3001 8\u00d75/6\uff0b2/5\u00f74
11\u3001 1/2\uff0b3/4\u00d75/12\u00d74/5
12\u3001 8/9\u00d73/4\uff0d3/8\u00f73/4
13\u3001 5/8\u00f75/4\uff0b3/23\u00f79/11
23) 1.2\u00d72.5+0.8\u00d72.5
24) 8.9\u00d71.25-0.9\u00d71.25
25) 12.5\u00d77.4\u00d70.8
26) 9.9\u00d76.4-\uff082.5+0.24\uff09\uff0827\uff09 6.5\u00d79.5+6.5\u00d70.5
0.35\u00d71.6+0.35\u00d73.4
0.25\u00d78.6\u00d74
6.72-3.28-1.72
0.45+6.37+4.55
5.4+6.9\u00d73-\uff0825-2.5\uff092\u00d741846-620-380
4.8\u00d746+4.8\u00d754
0.8+0.8\u00d72.5
1.25\u00d73.6\u00d78\u00d72.5-12.5\u00d72.4
28\u00d712.5-12.5\u00d720
23.65-\uff083.07+3.65\uff09
\uff084+0.4\u00d70.25\uff098\u00d77\u00d71.25
1.65\u00d799+1.65
27.85-\uff087.85+3.4\uff09
48\u00d71.25+50\u00d71.25\u00d70.2\u00d78
7.8\u00d79.9+0.78
(1010+309+4+681+6\uff09\u00d712
3\u00d79146\u00d7782\u00d76\u00d7854
5.15\u00d77/8+6.1-0.60625
1. 3/7 \u00d7 49/9 - 4/3
2. 8/9 \u00d7 15/36 + 1/27
3. 12\u00d7 5/6 \u2013 2/9 \u00d73
4. 8\u00d7 5/4 + 1/4
5. 6\u00f7 3/8 \u2013 3/8 \u00f76
6. 4/7 \u00d7 5/9 + 3/7 \u00d7 5/9
7. 5/2 -\uff08 3/2 + 4/5 \uff09
8. 7/8 + \uff08 1/8 + 1/9 \uff09
9. 9 \u00d7 5/6 + 5/6
10. 3/4 \u00d7 8/9 - 1/3
11. 7 \u00d7 5/49 + 3/14
12. 6 \u00d7\uff08 1/2 + 2/3 \uff09
13. 8 \u00d7 4/5 + 8 \u00d7 11/5
14. 31 \u00d7 5/6 \u2013 5/6
15. 9/7 - \uff08 2/7 \u2013 10/21 \uff09
16. 5/9 \u00d7 18 \u2013 14 \u00d7 2/7
17. 4/5 \u00d7 25/16 + 2/3 \u00d7 3/4
18. 14 \u00d7 8/7 \u2013 5/6 \u00d7 12/15
19. 17/32 \u2013 3/4 \u00d7 9/24
20. 3 \u00d7 2/9 + 1/3
21. 5/7 \u00d7 3/25 + 3/7
22. 3/14 \u00d7\u00d7 2/3 + 1/6
23. 1/5 \u00d7 2/3 + 5/6
24. 9/22 + 1/11 \u00f7 1/2
25. 5/3 \u00d7 11/5 + 4/3
26. 45 \u00d7 2/3 + 1/3 \u00d7 15
27. 7/19 + 12/19 \u00d7 5/6
28. 1/4 + 3/4 \u00f7 2/3
29. 8/7 \u00d7 21/16 + 1/2
30. 101 \u00d7 1/5 \u2013 1/5 \u00d7 21
31.50\uff0b160\u00f740 \uff0858+370\uff09\u00f7\uff0864-45\uff09
32.120-144\u00f718+35
33.347+45\u00d72-4160\u00f752
34\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
35.95\u00f7\uff0864-45\uff09
36.178-145\u00f75\u00d76+42 420+580-64\u00d721\u00f728
37.812-700\u00f7\uff089+31\u00d711\uff09 \uff08136+64\uff09\u00d7\uff0865-345\u00f723\uff09
38.85+14\u00d7\uff0814+208\u00f726\uff09
39.\uff08284+16\uff09\u00d7\uff08512-8208\u00f718\uff09
40.120-36\u00d74\u00f718+35
41.\uff0858+37\uff09\u00f7\uff0864-9\u00d75\uff09
42.(6.8-6.8\u00d70.55)\u00f78.5
43.0.12\u00d7 4.8\u00f70.12\u00d74.8
44.\uff083.2\u00d71.5+2.5\uff09\u00f71.6 \uff082\uff093.2\u00d7\uff081.5+2.5\uff09\u00f71.6
45.6-1.6\u00f74= 5.38+7.85-5.37=
46.7.2\u00f70.8-1.2\u00d75= 6-1.19\u00d73-0.43=
47.6.5\u00d7\uff084.8-1.2\u00d74\uff09= 0.68\u00d71.9+0.32\u00d71.9
48.10.15-10.75\u00d70.4-5.7
49.5.8\u00d7\uff083.87-0.13\uff09+4.2\u00d73.74
50.32.52-\uff086+9.728\u00f73.2\uff09\u00d72.5
51.[\uff087.1-5.6\uff09\u00d70.9-1.15] \u00f72.5
52.5.4\u00f7[2.6\u00d7\uff083.7-2.9\uff09+0.62]
53.12\u00d76\u00f7\uff0812-7.2\uff09-6 \uff084\uff0912\u00d76\u00f77.2-6
102\u00d74.5
7.8\u00d76.9\uff0b2.2\u00d76.9
5.6\u00d70.25
8\u00d7\uff0820\uff0d1.25\uff09
1\uff09127+352+73+44 \uff082\uff0989+276+135+33
\uff081\uff0925+71+75+29 +88 \uff082\uff09243+89+111+57
9405-2940\u00f728\u00d721
920-1680\u00f740\u00f77
690+47\u00d752-398
148+3328\u00f764-75
360\u00d724\u00f732+730
2100-94+48\u00d754
51+\uff082304-2042\uff09\u00d723
4215+\uff084361-716\uff09\u00f781
\uff08247+18\uff09\u00d727\u00f725
36-720\u00f7\uff08360\u00f718\uff09
1080\u00f7\uff0863-54\uff09\u00d780
\uff08528+912\uff09\u00d75-6178
8528\u00f741\u00d738-904
264+318-8280\u00f769
\uff08174+209\uff09\u00d726- 9000
814-\uff08278+322\uff09\u00f715
1406+735\u00d79\u00f745
3168-7828\u00f738+504
796-5040\u00f7\uff08630\u00f77\uff09
285+\uff083000-372\uff09\u00f736
1+5/6-19/12
3x(-9)+7x(-9
(-54)x1/6x(-1/3)
1.18.1\uff0b\uff083\uff0d0.299\u00f70.23\uff09\u00d71
2.(6.8-6.8\u00d70.55)\u00f78.5
3.0.12\u00d7 4.8\u00f70.12\u00d74.8
4.\uff083.2\u00d71.5+2.5\uff09\u00f71.6 \uff082\uff093.2\u00d7\uff081.5+2.5\uff09\u00f71.6
5.6-1.6\u00f74= 5.38+7.85-5.37=
6.7.2\u00f70.8-1.2\u00d75= 6-1.19\u00d73-0.43=
7.6.5\u00d7\uff084.8-1.2\u00d74\uff09= 0.68\u00d71.9+0.32\u00d71.9
8.10.15-10.75\u00d70.4-5.7
9.5.8\u00d7\uff083.87-0.13\uff09+4.2\u00d73.74
10.32.52-\uff086+9.728\u00f73.2\uff09\u00d72.5
11.[\uff087.1-5.6\uff09\u00d70.9-1.15] \u00f72.5
12.5.4\u00f7[2.6\u00d7\uff083.7-2.9\uff09+0.62]
13.12\u00d76\u00f7\uff0812-7.2\uff09-6
14.12\u00d76\u00f77.2-6
15.33.02\uff0d\uff08148.4\uff0d90.85\uff09\u00f72.5
0.4\u00d7125\u00d725\u00d70.8
1.25\u00d7\uff088+10\uff09
9123-\uff08123+8.8\uff09
1.24\u00d78.3+8.3\u00d71.76
9999\u00d71001
14.8\u00d76.3-6.3\u00d76.5\uff0b8.3\u00d73.7
1.24+0.78+8.76
933-157-43
4821-998
32\u00d7125\u00d725
9048\u00f726
2881\u00f7 43
3.2\u00d742.3\u00d73.75-12.5\u00d70.423\u00d716
1.8+18\u00f71.5-0.5\u00d70.3
6.5\u00d78+3.5\u00d78-47
(80-9.8)\u00d75\u5206\u4e4b2-1.32
8\u00d77\u5206\u4e4b4\u00f7[1\u00f7(3.2-2.95)]
2700\u00d7\uff08506\uff0d499\uff09\u00f7900
33.02\uff0d\uff08148.4\uff0d90.85\uff09\u00f72.5
\uff081\u00f71\uff0d1\uff09\u00f75.1
18.1\uff0b\uff083\uff0d0.299\u00f70.23\uff09\u00d71
\u6700\u540e\u795d\u5b66\u4e60\u8fdb\u6b65!!!
\u89e3\u65b9\u7a0b\uff0c\u516d\u5e74\u7ea7\u6c34\u5e73.
X - 15%X = 68 3.5X\uff0b1.8\uff1d12.3 3.6X\u00f72\uff1d2.16 0.8X\uff0d4\uff1d1.6
5X\u00f72\uff1d10 X\uff0d0.25X\uff1d3 4+0.7X=102 X-0.125X=8 x\uff0d0.375x=3/4
5 X\uff0d2.4\u00d75\uff1d8 15X\u00f72\uff1d60 4X\uff0bX\uff1d3.15 3.4X\uff0b1.8\uff1d8.6
5X\uff0dX\uff1d2.4 1.5X\uff0dX\uff1d1 6.6X\uff0d6X\uff1d1.8 x - 0.8x = 16+6
X\uff0b25%X=90 12x=300-4x 30\u00f7x+25=85 410-3x=170 3(x+0.5)=21 0.5x+8=43 6x-3x=18 1.5x+18=3x 5\u00d73-x\u00f72=8 9x-40=5 x\u00f75+9=21 48-27+5x=31 10.5+x+21=56 x+2x+18=78 (200-x)\u00f75=30 (x-140)\u00f770=4 0.1(x+6)=3.3\u00d70.4 4(x-5.6)=1.6 7(6.5+x)=87.5 (27.5-3.5)\u00f7x=4 x+19.8=25.8 5.6x=33.6 9.8-x=3.8 75.6\u00f7x=12.6 5x+12.5=32.3 5(x+8)=102 x+3x+10=70 3(x+3)=50-x+3 5x+6=11 2x-8=10 1/2x-8=4 12\uff0b34x=56 22\uff0d14x=12 54-X=24 7X=49 126\u00f7X=42 13+A=28.5 2.4X=26.4 70%X + 20%X = 3.6 2X\uff0b7X\uff1d9/10 180\uff0b6X\uff1d330 2.2X\uff0d1\uff1d10 X\uff0d0.8X\uff1d10 X\uff0b 2/5X\uff1d21
\u8fd9\u4e2a\u5f53\u7136\u662f\u5316\u5b66\u8f85\u5bfc\u4e66\u5566\uff0c\u53bb\u4e66\u5e97\u4e70\u4e00\u672c\u5427
1．焦硫酸（H2SO4•SO3）溶于水，其中SO3都转化为硫酸。若将445 g焦硫酸溶于水配成4.00 L硫酸，该硫酸的物质的量浓度为1．445g焦硫酸的物质的量n＝＝2.5mol，其中硫酸和三氧化硫的物质的量均为2.5mol，
5molSO3和水反应又会产生2.5nolH2SO4，所以溶液中H2SO4的物质的量是5.0mol，则＝1.25 mol/L；
若以浓硫酸吸水后生成H2SO4•H2O计算，250 g质量分数为98％的硫酸能吸收多少g水？
2．250 g质量分数为98％的硫酸溶液中含H2SO4的质量是m＝250 g×98％＝245g，则＝2.5mol。250 g质量分数为98％的硫酸溶液中含H2O的质量是m＝250g—245g＝5g。2.5mol H2SO4可以结合H2O的物质的量是2.5mol，水的质量m＝2.5mol×18g/mol＝45g，因此还能吸收水的质量是40g；
3．硫铁矿是工业上制硫酸的主要原料。硫铁矿氧化焙烧的化学反应如下：
3FeS2＋8O2→Fe3O4＋6SO2 4FeS2＋11 O2 →2Fe2O3＋8SO2
若48 mol FeS2完全反应耗用氧气2934.4 L（标准状况），计算反应产物中Fe3O4与Fe2O3物质的量之比。
3．由题意可知＝131mol，设生成Fe3O4的物质的量是amol，生成Fe2O3的物质的量是bmol，根据化学方程式3FeS2＋8O2→Fe3O4＋6SO2、4FeS2＋11 O2 →2Fe2O3＋8SO2得：8a＋11÷2b＝131（氧气守恒）和3a＋2b＝48（FeS2守恒），解得a＝4、b＝18，所以n（Fe3O4）: n（Fe2O3）＝2:9。
4.某中学化学课外活动小组对某工厂排放的含少量硫酸的废水进行抽样检测。取一定量的废水，用质量分数为1%的氢氧化钡溶液中和（其他物质不与氢氧化钡反应），当恰好中和时，消耗氢氧化钡溶液的质量为171 g，过滤后，测得滤液的质量为268.67 g。（不考虑过滤时滤液质量损失）（计算结果保留两位小数）
求：①反应中生成沉淀的质量为多少？
②该工厂排放的废水中所含硫酸的质量分数为多少？
答案：
①设生成沉淀的质量为x，废水样品中所含硫酸质量为y。
x=2.33 g y=0.98 g
②根据质量守恒定律，所取废水样品质量=（268.67＋2.33）g－171 g=100 g
该工厂排放的废水中硫酸的质量分数=
答：①反应中生成沉淀的质量为2.33 g。②该工厂排放的废水中所含硫酸的质量分数为0.98%。
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绛旓細鑻48 mol FeS2瀹屽叏鍙嶅簲鑰楃敤姘ф皵2934.4 L锛堟爣鍑嗙姸鍐碉級锛璁＄畻鍙嶅簲浜х墿涓璅e3O4涓嶧e2O3鐗╄川鐨勯噺涔嬫瘮銆3锛庣敱棰樻剰鍙煡锛131mol锛岃鐢熸垚Fe3O4鐨勭墿璐ㄧ殑閲忔槸amol锛岀敓鎴怓e2O3鐨勭墿璐ㄧ殑閲忔槸bmol锛屾牴鎹鍖栧鏂圭▼寮3FeS2锛8O2鈫扚e3O4锛6SO2銆4FeS2锛11 O2 鈫2Fe2O3锛8SO2寰楋細8a锛11梅2b锛131锛堟哀姘...
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