百度试题 结果1 题目A chemical change always involves a change in the ___ of matter. A. state B. properties C. quantity D. location 相关知识点: 试题来源: 解析 B。化学变化总是涉及物质性质的变化。反馈 收藏
百度试题 结果1 题目Chemical changes often involve a change in ___. A. color B. size C. shape D. weight 相关知识点: 试题来源: 解析 A。化学变化通常会涉及颜色的变化,而大小、形状和重量一般在物理变化中可能改变更多。反馈 收藏
Chemical reactions often involve a change in ___. A. color B. shape C. size D. weight 相关知识点: 试题来源: 解析 A。化学反应经常涉及颜色的变化。形状、大小和重量的变化不一定是化学反应的典型特征,而颜色变化在很多化学反应中较为常见,所以选 A。反馈 收藏 ...
In a chemical reaction, the reactants are transformed into products. This process often involves a change in ___. A. energy B. color C. shape D. size 相关知识点: 试题来源: 解析 A。解析:化学反应中,反应物转化为产物通常涉及能量的变化。选项 B 颜色可能改变,但不是必然;选项 C 形状和选项...
A. color B. size C. shape D. weight 相关知识点: 试题来源: 解析 A。解析:化学反应经常会有颜色变化。选项 B 尺寸变化一般不是化学反应的主要特征;选项 C 形状变化也不是化学反应常见的特征;选项 D 重量变化不一定在化学反应中普遍发生。反馈 收藏 ...
1.7When a chemical change occurs: B A there is no change in mass, in the number of atoms or in the number of molecules B there is no change in mass or the number of atoms, but there is a change in the number of molecules C there is no change in mass, but the number of molecul...
A chemical change is different from a physical change because in a chemical change ___. A. the appearance changes B. the composition changes C. the size changes D. the weight changes 相关知识点: 试题来源: 解析 B。化学变化与物理变化不同在于化学变化中物质的组成发生了变化。反馈 ...
题目A chemical change results in the formation of new ___. A. substances B. states C. shapes D. colors 相关知识点: 试题来源: 解析 A。化学变化会形成新的物质,“substances”是物质,“states”是状态,“shapes”是形状,“colors”是颜色。反馈 收藏 ...
A. A change in temperature. B. A change in volume. C. A change in mass. D. A change in position. 相关知识点: 试题来源: 解析 A。解析:温度变化是化学反应的一个标志。选项 B 体积变化不一定是化学反应引起的;选项 C 质量变化在一般化学反应中不太明显;选项 D 位置变化与化学反应无关。反馈...
A. a chemical change is always faster. B. a physical change does not change the appearance of a substance. C. a chemical change produces new substances. D. a physical change always requires heat. 相关知识点: 试题来源: 解析 C。解析:化学变化和物理变化的区别是化学变化产生新物质。A 不一定...