计算下列常用试剂的物质的量浓度[tex=4.571x1.214]zXs5eNgj/CI0dSDnUfYVU1umjxQbpuzg9aOF94fEGdYz/7C+gt9DFcdbYVDGzk78[/tex]及摩尔分数。质量分数为37%,密度d为[tex=4.786x1.429]7csOsvC2GuXPSnEzu7bvCNzwGCFxCebB7Y1PcRgfW4W3oLLt9ZCLAIiWt44SKebN[/tex]的浓盐酸。
举一反三
- 计算下列常用试剂的物质的量浓度[tex=4.571x1.214]zXs5eNgj/CI0dSDnUfYVU1umjxQbpuzg9aOF94fEGdYz/7C+gt9DFcdbYVDGzk78[/tex]及摩尔分数。质量分数为28%,密度d为[tex=4.786x1.429]Wh3CYWZDVPNONZ43yCgLRavGOoPVX31vXDBhw7z7mH0uDQV8l18xVS+oof3bLo84[/tex]g.
- >>>x= [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9]>>>print(x.sort()) 语句运行结果正确的是( )。 A: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] B: [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9] C: [10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0] D: ['2', '4', '0', '6', '10', '7', '8', '3', '9', '1', '5']
- set1 = {x for x in range(10) if x%2!=0} print(set1) 以上代码的运行结果为？ A: {1, 3, 5, 7, 9} B: {1, 3, 5, 7} C: {3, 5, 7, 9} D: {3, 5, 7}
- set1 = {x for x in range(10) if x%2!=0} set1.remove(1) print(set1) 以上代码的运行结果为？ A: {1, 3, 5, 7, 9} B: {1, 3, 5, 7} C: {3, 5, 7, 9} D: {3, 5, 7}
- set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为？ A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}