【单选题】在一定温度下,将 150mL,100kPa的氢气与75mL,45kPa的氧气装入250mL的真空瓶,则氢气和氧气的分压分别为( )
【单选题】患者男,43岁。患慢性胆囊炎。护士嘱附患者应用的饮食是
【简答题】.They’re looking for a(n) (experience )_______manager to improve the overseas business. With the (introduce)______of the Internet, more and more people preferred to shop online. (unfortunate)______ yo...
【简答题】将铁和氧化铁的混合物15g加入150mL稀硫酸中,在标准状况下放出氢气1.68L,同时铁和氧化铁均无剩余,向溶液中滴加硫氰化钾溶液后,未见颜色变化,为了中和过量的硫酸,而且使铁完全转化成 Fe(OH) 2 ,共消耗3mol/L的NaOH溶液200mL。则原硫酸溶液的浓度_____________。
【判断题】According to Christakis people who stopped smoking had more connections.
【简答题】More and more Chinese people care for their own health. I come from England. I came to China five years ago. I began to learn cooking Chinese food from my father. When I was fif, I began to help m...
【单选题】常温下将2升100Kpa的氢气,压缩到1升,从氢气的性质可知,其压强将()