Chemistry, 30.10.2020 22:40 Bryson2148
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In a flame test, two chemical samples produce a green flame. The samples must both.
contain copper
have the same chemical formula and composition
contain oxygen
contain sulfur
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Chemistry, 22.06.2019 02:40
The difference between the atomic number of an element and the element’s atomic mass is the number of ions.
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Chemistry, 22.06.2019 13:10
The last few miles of the marathon are the most difficult for heather, her hair plastered to her head, sweat clinging to her arms, and her legs already feeling as if they had nothing left, just dead weight. after grabbing a cup of ice water, she feels the ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. in these last few miles, the breeze kicks up and she finally feels some coolness against her skin. drips of sweat, once clinging to her forehead, now spill down, and heather feels more pain as the sweat flows into her eyes.which of the following is the most likely reason why the ice struck heather’s nose when she took a drink? a) water can function as a solvent. b) water can store large amounts of heat. c) water can moderate temperatures through evaporative cooling. d) the density of water decreases when it freezes. e) water has a cohesive nature.sweat remained on heather’s forehead and arms because of the a) high salt content of sweat b) cohesive nature of water c) ability of water to moderate heat d) high evaporative cooling effect of water e) ability of water to act as a solvent
Answers: 1
Chemistry, 23.06.2019 01:00
Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released
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Chemistry, 23.06.2019 01:20
How can parts of a solution be separated by chromatography?
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