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Rashid [163]
3 years ago
8

if one person can clean a house in 5 hours and the second person can clean the same house in 4 hours, how long would will it tak

e to clean the house if they worked together?
Chemistry
1 answer:
Anettt [7]3 years ago
3 0
1/5 + 1/4 =1/x

4x + 5x = 20

9x = 20 

x = 2.22 hours  Answer
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if 45.0 ml of 1.50 M Ca(OH)2 are needed to neutralize 25.0 ml of HI of unknown concentration, what is the molarity of the HI?
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