高中化學求詳解:－線上遊戲排行榜2013/2014,進擊的巨人線上看,candy crush saga外掛,正妹寫真三圍

Blogtrottr

Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 發問中

Microsoft Excel 2010 Training Course

Beginner / Intermediate self-paced online course of Microsoft's spreadsheet application. Enroll for just $99.

From our sponsors

高中化學求詳解

Aug 24th 2013, 08:06

1.污水試樣5ml先加蒸餾水稀釋為500ml,測得含氧量8.0ppm, 5日後再測其含氧量為4.0ppm,則此污水之BOD值為:
       A. 4ppm    B. 40ppm   C. 200ppm    D. 400ppm

2.0.3M之CH3COOH溶液(Ka=2.0x10^-5)1L中,需加入多少莫耳
   之NaOH,可得PH=5之緩衝溶液 (log2=0.3):
       A. 0.2   B. 0.3    C. 0.4   D. 0.15

以上二題請詳解,THANKS!!

This entry passed through the Full-Text RSS service — if this is your content and you're reading it on someone else's site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers. Five Filters recommends: 'You Say What You Like, Because They Like What You Say' - http://www.medialens.org/index.php/alerts/alert-archive/alerts-2013/731-you-say-what-you-like-because-they-like-what-you-say.html

You are receiving this email because you subscribed to this feed at blogtrottr.com.

If you no longer wish to receive these emails, you can unsubscribe from this feed, or manage all your subscriptions