Chemistry, 24.07.2019 17:40 zaynmaliky4748
Need 1. decide whether each of these reactions is exothermic or endothermic: a. when two chemicals mix their temperature rises: b. a solid burns brightly and releases heat, light and sound: c. when two chemicals are mixed their temperature drops: d. two chemicals will only react if you heat them continually: e. plants take in light energy for photosynthesis: 2. 4 fe = 3o2 → 2 fe2o3 is this equation balanced? yes / no, explain why 3. which chemical equation is balanced? 2na + cl2 → 2nacl na + 2cl2 → 2nacl 2na + 2cl2 → 2nacl na + cl2 → nacl 4. list four signs of a chemical reaction.
Answers: 1
Chemistry, 21.06.2019 19:20
What is the strongest intermolecular force between an nacl unit and an h2o molecule together in a solution? covalent bonding dipole-dipole force hydrogen bonding ion-dipole force
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Chemistry, 22.06.2019 10:30
Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.
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Chemistry, 22.06.2019 23:30
Match each statement with the state of matter it describes
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Need 1. decide whether each of these reactions is exothermic or endothermic: a. when two chemical...
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