2023河北部分学校高三三模政治答案-早知道

One possible versionThe Most Beautiful Place in My HeartAs a 17-year-ol teenager, I ve been to many great cities, among which Luoyang is the most beautiful one inlocated on the north bank of the luo river in western Henan pruvinee l aovany is surrounded by mountains on threesidles, high in the west and low in the east. At the end of 2019, Luoyang had a population of more than 7. I millionI love Luoyang so much due to the fact that as one of the four ancient capitals of China, Luoyang has a civilizationhistory of 5, 000 years. Whats more, the number of its heritage sites is second only to Beijing in cities of China. And itfamous tourist attractions inelude Lungmen Grottoes, Baima Temple, Guanlin and so on

解析:用油膜法估测分子直径时,为了使油酸在浅盘的?面厂容島形成一块单分子层油膜,需要+抗油滷油酸酒精溶液形成的油膜的面积为160cm酸稀释成一定浓度的油酸酒精溶液,油;了的直d=3,油酸未完全散开,所泞小,d大。每滴酒精油酸溶液中含有纯油酸的体积V=1056mL=1×y“m3,油酸膜的面积为S=1.6×102m2,把油酸分子看成球形,且不考肉分川的主腺,则分子的直径d=sX10-11.6×10-7m=6.25×10-m,答案:单分子(1分)偏大(1分)6.25×10-1(3分)(体发生等压变化盖一吕萨克定律得(2分)t=375K解得原气球内气体的体积为V2=500m3(1分)球内剩余气体的质量点原来气球内气体量的百分比为0m×19%-8(2分()设气球刚好从地面飘起时气珠内的气体温度为T,密度为p,则气珠升起时浮力等于气球和内部的总重力即PKV=Mg+pV(1分)1为气岩的气体温度升高时压强井没有变化,则原来的气体温度升高后体积设力V,根据质量炽诉有PV:=pV(1分)原来的气体温度升后不变,体积从V变力V由盖一吕萨克定律滑”(2分)解得T≈43K1分