資源簡介 {#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}{#{QQABIYSQggiIQBBAAQhCAQVgCAGQkgCACagOwBAEMAIByANABAA=}#}洪山區2024-2025九年級期中考試物理試卷答案一、選擇題。(每小題3分,共54分)910111213155公D的CD爾Bc181920AD二、非選擇題。(共46分)21.(3分)廢氣帶走的能量:100:75022.(3分)并聯:增大:a23.(3分)2:35:7:624.(5分)(1)加熱時間的長短:質量:升高的溫度(2)a:2.1×103J/(kg℃)25.(5分)(1)電池:L1:燈泡L1變亮(2)小紅,小紅選用不同規格的小燈泡,使實驗結論更具普遍性:串聯電路中,各部分電壓之和等于電源電壓26.(5分)(1)(2)0.36,電阻一定,通過電阻的電流與電阻兩端電壓成正比。(3)不能,小燈泡電阻會隨溫度變化27.(10分)解:(1)水壺中水燒開需要吸收的熱量:2袋=ckmk-6)=4.2×10J1gC)xkg×(100C-25℃=3.15×10J(2)丁烷完全燃燒放出的熱量Q放=3500J/s×1805=6.3×103J燒水的熱效率,7=是x10%=25x10產x10%=50%Q數6.3×105J(3)提高后的燒水效率7=n+10%=60%原效率燒水,由g=9絲可得,需要燃氣的質量m==63x10=13,125gmm4.8×10J1kg效率提高后,水燒開吸收的熱量不變,則由'Q=Q可得”_0a=9m=m-節約的燃科質量m=m-m石m=×13,128=2.187536洪山區2024-2025學年度第一學期期中質量檢測化學試卷參考答案123567PBDCBcADB28.(1)24.31(2)失去Mg2+(3)B29.(1)C(2)CH4+2H20高溫4H2+C02(3)負增強水的導電性30.(1)H20(2)2H02Mn022H,0+0t(3)安靜燃燒,產生淡藍色火焰,放出熱量,生成無色液滴(4)1.631.(1)長頸漏斗可以控制反應速率(2)防止空氣中二氧化碳和水進入C裝置,影響實驗結果。(3)O2未干燥,導致O2中混有的水蒸氣進入B裝置被無水硫酸銅吸收。(4)1:2是32.(1)3.2(2)設剩余固體中MnO2的質量為x2KMnO,AK2MnO+MnO:+O:t8732x3.2g87=X323.2gx=8.7g答:剩余固體中MnO2的質量為87g 展開更多...... 收起↑ 資源列表 湖北省武漢市洪山區2024-2025學年九年級上學期11月期中物理、化學試題.pdf 答案.pdf 縮略圖、資源來源于二一教育資源庫