1. Is energy absorbed or released when chemical bonds are broken during a chemical reaction?
...
Chemistry, 05.05.2020 09:30, katdoesart65091
1. Is energy absorbed or released when chemical bonds are broken during a chemical reaction?
2. Is energy absorbed or released when chemical bonds are formed during a chemical reaction?
3. What are some real life examples of an exothermic reaction?
4. What are some real life examples of a endothermic reaction?
5. Compare and contrast Endothermic vs. a Exothermic reaction
6. Analyze the folloiwng scenario:
In chemistry class after adding two chemical substances in a test tube ( which is the system) you noticed when you touch the tube that it begin to get very cold. What type of chemical reaction is this? Endothermic or Exothermic ... Use the scenario to explain your response.
7. Define ΔH Enthalpy
8. Compare and Contrast a positive ΔH(Enthalpy) to a negative ΔH( Enthalpy)
9. Explain the relationship between Enthalpy and a Exothermic reaction, and a Endothermic reaction
10. Explain how the Potential Energy curve's of a Endothermic different from a Exothermic reaction
Answers: 3
Chemistry, 22.06.2019 21:40, k3rbycalilung
Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.
Answers: 2
Social Studies, 29.08.2019 16:30
English, 29.08.2019 16:30
History, 29.08.2019 16:30
Biology, 29.08.2019 16:30
Mathematics, 29.08.2019 16:30
English, 29.08.2019 16:30