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Chemistry, 21.06.2019 14:30
Which statement justifies that phosphine (ph3) is a polar molecule?
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Chemistry, 23.06.2019 10:30
How is it possible for someone to put an ear to a wall and hear someone in the next room? a.sound waves can travel though solids. b.the waves travel from room to room via air. c.there must be some air in the wall so the sound can travel through it. d.sound waves change to electromagnetic waves and then back again.
Answers: 1
Chemistry, 23.06.2019 11:00
Which of the following reactions represents an exothermic reaction? nh3(g) + 12.0 kcal ½n2(g) + 3/2 h2(g) ch4 + 2o2 co2 + 2h2o + 212,800 cal c + 2s cs2, h = 27,550 cal c(graphite) c(diamond), h = 0.45 kcal 2h2o 2h2 + o2, h = +58 kcal
Answers: 1
Chemistry, 23.06.2019 11:30
All of the following describe uses of nonrenewable energy sources except
Answers: 3
Which is a chemical property of soda ash? a. it's a highly basic substance. b. it's a white crystal...
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