University:
Emory University
Course:
CHEM 141 | General Chemistry I
Academic year:

2021
Views:

198

Pages:

3
Author:

Aiden F.

1. 3 phases of matter solid, liquid, & gas, How would you distinguish them?! What's the difference between them? Solid tightly packed Liquid Close together with no regular arrangement. Gas Atoms/molecules that are seperated with no regular arrangement 2$3. Balancing Equations 4. Concept of moles How many moles are there Exan Oxya 2 moics of Hydrogen, 4 moles of for the subscript 5. Molar mass Example what is the molar mass of 6. Molar mass of a larger compound 7. Balancing Equations Example H₂O = 18 grams (molar ere are 2 moles of H₂O (36 grams) mas 8. Number of atoms in a substance Example How many atoms are in CO2 carbon atoms are in co roon, 2 Oxygen, BUT How many 9. Find the mass of a compound 10 Which chemical equation is NOT balanced 11. How many moles are there? Example I mole of O2 which 13 32 gram no do I have? 05 re's only lo grams, How many mores. 12. Definition: Meaning of the ability to work? Energy is the ability to do work work is actually the transfer of energy. when work is done to an object, energy. that object Energy is red in joules Is transferred to 13. Concept of energy. 2 main problems that we are currently dealing with in regards to energy. New blodegradeab plastics Ozone layer chen 14. Difference between kinetic and potential energy. Potential energy = stored energy. kinetic energy the energy of motion. Is. Joules Cal, cal Joules Equation 16. Definition: Meaning of specific heat/specific heat capacity. The energy required raise the temperature of one gram of a substance by one degree C 17. Difference between endothermic and exothermic Exothermic Energ Ns out of the system. Endothermic Energy flows into the system. 18. Energy = mass x AT x Aheat capacity Equation 19. What is the heat capacity for water? 4 184 J/g°C 20. What is the unit for energy? Joules and calories. 21. When writing the molar mass unit, what needs to be included? Garams per 22. Molar mass Example 2 moles of Oxygen 32 grams Equation Asymbolic representation 23. Definition of chemical of a chemical reaction in the form of symbols and formulac wherein the reactant entities are given on the left- hand side and the product entities on the right-hand Side 24. If you have a chemical reaction that releases energy, what do you call it? Exothermic 25. When you have a reaction that absorbs energy, what do you call it? Endothermic 26. What is bond breaking? Energy. breaking is absorbed to break bonds ptriermic process Energy is. relco Cexomermic process) 27. What is the molar mass of water? 18 01528 g/mol 28. What is the shape of water? Bent (undefined (v shape) 29. Is water a polar molecule? Yes/No (Opposite onds with different charges) 30. Meaning of hydrogen bonds (bonding to other atoms such as oxygen and nitrogen) + are attracted to chara hydreasn bond is the attractive force braween the huarpe electronegative arom is usually oxygen, nitrogen, or Fluorinc because of us partial negative charge. 31. What is a solar energy? Radient energy (from the sun) 32 How much (1) is Earth covered by water? 7% 33. True/False: Do we use less than 1% of available water resources. 65% 34. What is the difference between adhesion and cohesion? Adhesion The atraction of water to other surfaces and substances Cohesion The attraction of water to itself C-H lbonds)