Chemistry, 24.02.2021 01:00, dmc79765

How many Helium (He) gas molecules are present in a balloon with a volume of 1.5L at STP?

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Chemistry, 21.06.2019 15:00, chhimmidemg

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

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Chemistry, 21.06.2019 18:00, thechocolatblanc

During which movies do spring tides new moon first quarter waxing gibbous waxing

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Chemistry, 22.06.2019 06:30, Pizzapegasus1

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

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Chemistry, 22.06.2019 11:00, hannah5143

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.