Monday 5 December 2016

everyday chemistry - What could happen when mixing bleach with other cleaning residue?


I have a wall covered in mold. I have used various cleaning wipes attempting to clean it, including a vinegar mixture. I now want to spray the wall with a bleach cleaner. I am concerned for fumes from what may be considered mixing. For how long is the previous cleaning considered active enough to mix with the current cleaning ingredients? In other words, if I cleaned with vinegar a week ago, has enough time elapsed to safely use the bleach?




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readings - Appending 内 to a company name is read ない or うち?

For example, if I say マイクロソフト内のパートナーシップは強いです, is the 内 here read as うち or ない? Answer 「内」 in the form: 「Proper Noun + 内」 is always read 「ない...