本课配套习题挑战模式1/5
甲型H1N1流感病毒正威胁着人类的健康和安全。“达菲”(C16H28O4N2)是目前世界上治疗H1N1流感病毒的良药。生产“达菲”的主要原料是莽草酸,可从茴香中提取。“达菲”分子中,氧、氮两种元素的质量比正确的是
A: 7:8 |
B: 8:7 |
C: 16:7 |
D: 7:16 |
- 提示1:PHA+5rOo5oSP5LiL6LSo6YeP5q+U5piv77yv77yaTuOAgjxicj48L3A+
- 提示2:PHA+5rOo5oSP5LiL55u45a+55Y6f5a2Q6LSo6YeP55qE5pWw5YC877yaPGJyPjwvcD48cD5P77yaMTYmbmJzcDsmbmJzcDsmbmJzcDsmbmJzcDsgTu+8mjE0PGJyPjwvcD4=
- 答案:Qw==
PHA+QzxzdWI+MTY8L3N1Yj5IPHN1Yj4yODwvc3ViPk88c3ViPjQ8L3N1Yj5OPHN1Yj4yPC9zdWI+5LitT++8mk49ICgxNsOXNCk6KDE0w5cyKT0xNjo3PC9wPg==
本课配套习题挑战模式2/5
乳酸亚铁片可用于治疗缺铁性贫血。下图为乳酸亚铁说明书上部分文字。请仔细阅读后回答问题:乳酸亚铁中碳、铁两种元素的质量比为正确的是
A: 7:9 |
B: 18:16 |
C: 9:7 |
D: 9:5 |
- 提示1:PHA+5rOo5oSP5LiL6LSo6YeP5q+U5pivQ++8mkZl44CCPGJyPjwvcD4=
- 提示2:PHA+5rOo5oSP5LiL55u45a+55Y6f5a2Q6LSo6YeP55qE5pWw5YC877yaPGJyPjwvcD48cD5D77yaMTImbmJzcDsmbmJzcDsmbmJzcDsgRmXvvJo1Njxicj48L3A+
- 答案:Qw==
PHA+QzxzdWI+Njwvc3ViPkg8c3ViPjIwPC9zdWI+RmVPPHN1Yj42PC9zdWI+5Lit77yMQ++8mkZlPe+8iDEyw5c277yJOjU2PTk6Nzxicj48L3A+
本课配套习题挑战模式3/5
科学家发现,从红豆杉中提取的紫杉醇(C47H51NO14)是一种抗癌新药。1994年之后,科学家在实验室里人工合成了紫杉醇。假如人工合成的紫杉醇与天然紫杉醇的成分和结构完全相同,据此计算紫杉醇中的碳、氢、氮、氧元素的质量比正确的是
A: 564:51:7:112 |
B: 564:51:14:224 |
C: 564:51:7:224 |
D: 564:51:14:448 |
- 提示1:PFA+5rOo5oSP5Y6f5a2Q5pWw55qE5YeG56Gu5oCnPC9QPg==
- 提示2:PFA+5rOo5oSP55+l6K+G55qE6L+B56e777yM5YW25a6e6aKY55uu5Y+q5piv57uZ5LqG5LiA5Liq5paw55qE5oOF5pmv44CCPC9QPg==
- 提示3:PFA+5L2g5bey5LiN6ZyA6KaB5o+Q56S677yM57uG57uG566X5rKh6Zeu6aKY55qE44CCPC9QPg==
- 答案:Qg==
PFA+QzxTVUI+NDc8L1NVQj5IPFNVQj41MTwvU1VCPk5PPFNVQj4xNDwvU1VCPjwvUD4NCjxQPu+8iDEyw5c0N++8ie+8mu+8iDHDlzUx77yJ77ya77yIMTTDlzHvvIk677yIMTbDlzE077yJPTU2NO+8mjUx77yaMTTvvJoyMjTljbPlj6/lvpfliLDnrZTmoYhC44CCPC9QPg==
本课配套习题挑战模式4/5
N2O5中氧元素和氮元素的质量比是
A: 20:7 |
B: 12:7 |
C: 7:20 |
D: 7:12 |
- 提示1:PHA+5rOo5oSP5LiL6LSo6YeP5q+U5pivT++8mk48YnI+PC9wPg==
- 提示2:PHA+5rOo5oSP5LiL55u45a+55Y6f5a2Q6LSo6YeP55qE5pWw5YC877yaPGJyPjwvcD48cD5P77yaMTYgJm5ic3A7ICZuYnNwOyBO77yaMTQ8YnI+PC9wPg==
- 答案:QQ==
PHA+TyDvvJpOPTE2w5c1LygxNMOXMik9ODAvMjg9MjAvNzxicj48L3A+
本课配套习题挑战模式5/5
小华按下图配方自己做一瓶清凉甘甜的汽水。根据图中信息回答:白糖的主要成分是C12H22O11,C12H22O11属于_____,其中碳、氢、氧三种元素的质量比是
A: 有机物 72:11:44 |
B: 混合物 72:11:44 |
C: 无机物 72:11:88 |
D: 有机物 72:11:88 |
- 提示1:PHA+5pyJ5py654mp55qE5qaC5b+15piv5LuA5LmI5ZGA77yM5oOz5oOz5ZOmfjwvcD4=
- 提示2:PHA+5rOo5oSP5LiL55u45a+55Y6f5a2Q6LSo6YeP55qE5pWw5YC8PC9wPg==
- 提示3:PHA+5peg6ZyA6L+b5LiA5q2l5o+Q56S677yM5LuU57uG5YGa77yM5rKh6Zeu6aKY55qE77yBPC9wPg==
- 答案:RA==
PHA+6ICD54K55Li65YyW5a2m5byP5LiO5YWD57Sg6LSo6YeP5q+U55qE5o2i566X77yM6aaW5YWI56Gu5a6a5piv5pyJ5py654mp77yM5Luj5YWl5pWw5YC85LuU57uG6K6h566X5Y2z5Y+v44CCPGJyPjwvcD48cD48YnI+PC9wPg==