Chemistry, 13.04.2021 03:10 madmatt873

What pharmaceutical brand vaccines are available to citizens of the united states?

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Chemistry, 21.06.2019 22:00, creepycrepes

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

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Chemistry, 21.06.2019 23:00, AbhiramAkella

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

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Chemistry, 22.06.2019 05:30, greekfreekisdbz

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

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Chemistry, 22.06.2019 12:10, kaitlynbernatz2778

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?