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Chemistry, 22.06.2019 08:30
Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size
Answers: 1
Chemistry, 23.06.2019 00:50
What is the enthalpy of combustion (per mole) of c4h10 (g)? –2,657.5 kj/mol –5315.0 kj/mol –509.7 kj/mol –254.8 kj/mol
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Chemistry, 23.06.2019 01:30
If a particle has z = 25 and 23 electrons, what is its charge?
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Chemistry, 23.06.2019 12:00
Which of the following involves only abiotic factors? a. a large rock being weathered by wind and rain b. an otter using a stone to break open a sea urchin c. a spider building a web in the corner of a building d. a pine tree absorbing light from the sun
Answers: 1
It has to have a molecular geometry where the bond dipoles do not cancel....
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