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  • The volume of a medium-sized grain of sand is 62 nL.If I gave you Avogadro's number

    The volume of a medium-sized grain of sand is 62 nL.If I gave you Avogadro's number
    of grains of sand this size and assuming that all of the sand could pack together with no
    empty space,which of the following is closest to the volume that would be required to
    hold that much sand?
    A) The volume of a medium-sized forest pond,which is about 1x10^6 L.
    B) Roughly the volume of Lake Mead (formed by the Hoover Dam),which is
    approximately 3.5x10^13 L.
    C) About half the volume of the Caspian Sea,which has a total volume of 7.8x10^16 L.
    D) The volume of all the oceans on the earth,which is about 1.4x10^21 L.
    E) The volume of the earth,which is about 1x10^24 L.
    英語人氣:130 ℃時間:2020-04-06 09:06:09
    優(yōu)質(zhì)解答
    先大概翻一下 sand就是沙子 或者石英砂 反正是什么不影響
    中尺寸的石英砂晶體的體積是62nL(這個單位沒見過 參考納米理解為納升 就是10^(-9)L).如果給你NA個這種石英砂晶體,假定所有的石英砂都可以無縫隙地堆在一起,下列哪一種最接近能夠裝下這些石英砂的體積?
    選項(xiàng)不用看懂 后面的數(shù)字知道就行
    算的話就是NA*62*10^(-9)=大概是3.7*10^16
    就選C了 這個最接近 C選項(xiàng)是里海的總體積.
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