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Is a humidifier putting moisture into the air a physical or chemical change and why?
asked
Apr 6, 2017
Chemistry
high-school
2
answers
5
votes
42.9k
views
How many identified isotopes does samarium have?
asked
Mar 18, 2017
Chemistry
middle-school
1
answer
0
votes
15.9k
views
What is 100 divided by 5 times 5 minus 6 minus 12
asked
Feb 5, 2017
Mathematics
middle-school
1
answer
1
vote
111k
views
Which is the best estimate for the sum of 3/8 and 1/12?
asked
Sep 17, 2016
Mathematics
middle-school
2
answers
4
votes
38.8k
views
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