Chemistry, 07.07.2019 14:00 mandyj5477
When calcium (ca) bonds with oxygen, it gives up two electrons. what is the charge of the ca ion in this compound?
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Chemistry, 22.06.2019 02:30
List four observations that indicate that a chemical reaction may be taking place
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Chemistry, 22.06.2019 06:00
There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit
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Chemistry, 22.06.2019 08:00
An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.
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Chemistry, 23.06.2019 01:30
In which phase of mitosis do the spindle fibers pull the chromosomes apart to opposite sides of the cell ?
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When calcium (ca) bonds with oxygen, it gives up two electrons. what is the charge of the ca ion in...
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