A 反应容器内的压强不随时间改变 B 反应容器内气体总物质的量不变 C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109161615201520.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109161697649764.jpg" alt="" border="0" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109161633563356.jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109161697549754.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109161680148014.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109161613901390.jpg" alt="" border="0" />

A x+y<m+n B x+y＞m+n C x<m+n D x>m+n

A 降低温度，一定能使不饱和溶液变成饱和溶液 B 在10℃时，50g水中溶解了8gA物质，则0℃时A物质的溶解度是16g C 把15gNaCl溶于100g水中，可制得15%氯化钠溶液 D 升高温度时，气体的溶解度减小

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109162026752675.jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109162048284828.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109162048244824.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130109162023052305.jpg" alt="" border="0" />

A 溶液的质量减小 B 硫酸铜的溶解度增大 C 溶液的浓度变小 D 溶液的蓝色加深

A 20% B 16.7% C 26.5% D 36%

A 110.3g B 40.2g C 60.3g D 73.5g

A 把2molNaOH溶于1L水所得的溶液 B 把80gNaOH溶于水并使体积为1L的溶液 C 含有2molNaOH的溶液 D 把含40gNaOH的2L溶液蒸发掉一半水所得的溶液

A 铜 B 干冰 C 冰醋酸 D 葡萄糖