精品偷拍一区二区三区,亚洲精品永久 码,亚洲综合日韩精品欧美国产,亚洲国产日韩a在线亚洲

  • <center id="usuqs"></center>
  • 
    
  • 并不是翻譯題 所以不需要給我翻譯出來~

    并不是翻譯題 所以不需要給我翻譯出來~
    1)One of the first mixtures of metals,called amalgams,used by dentists for tooth fillings consisted of 26.0gof silver,10.8g of tin,2.4g of copper,and 0.8g of zinc.How much silver is in a 25.0g sample of this amalgam?
    2)there are 7.0 x 10^6red blood cells(RBC) IN 1.0mm^3 of blood.How many red blood cells are in 1.0L of blood?
    3)Gold has a density of 19.3g /cm^3.what is the density in kilograms per cubic meter?
    英語人氣:514 ℃時(shí)間:2020-05-11 10:55:46
    優(yōu)質(zhì)解答
    1 26/(26+10.8+2.4+0.8=15)*25=16.25克
    2 7*10^6*1000000=7.0*10^12
    3 19.3*1000000/1000=19300KG/M^3
    我來回答
    類似推薦
    請使用1024x768 IE6.0或更高版本瀏覽器瀏覽本站點(diǎn),以保證最佳閱讀效果。本頁提供作業(yè)小助手,一起搜作業(yè)以及作業(yè)好幫手最新版!
    版權(quán)所有 CopyRight © 2012-2024 作業(yè)小助手 All Rights Reserved. 手機(jī)版