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Chemistry 3
Part A Use the Covalent Bonding Tutorial to answer these questions.
https://pbslm-contrib.s3.amazonaws.com/WGBH/arct15/SimBucket/Simulations/chemthink-covalentbonding/content/index.html (Links to an external site.) (Links to an external site.)
1. Explain why you can describe covalent bonding as atoms fighting over electrons.
2-When there is a stable balance between the attractive and repulsive forces between atoms the atoms will form a bond. Describe what happens to potential energy when that happens.
Part B Use the Ionic Bonding Tutorial to answer the following questions .
https://pbslm-contrib.s3.amazonaws.com/WGBH/arct15/SimBucket/Simulations/chemthink-ionicbonding/content/index.html (Links to an external site.) (Links to an external site.)
3-What is the formula for the ionic compound formed between calcium ions and fluoride ions?
4-Explain how you can use the mole number (6.02 x 1023) to count atoms. Answer in complete sentences. Give an example to show how to count atoms using the mole number.
5- What is the mass of 1 carbon atom in grams? What is the mass of one dozen carbon atoms in grams? What is the mass of 1 mole of carbon atoms in grams? Show your work or explain how you got the answer.
6- You are given a 10.0 grams sample of ethanol (CH3CH2OH). Explain how you can use the molar mass of ethanol to find the number of ethanol molecules and the number of carbon atoms in the sample. Answer in complete sentences and show your work to receive credit.
7-Determine the Molecular Weight (MW) or Formula Weight (FW) of the following compounds. Show your work to receive credit.
CuCl2 copper(II) chloride
Al2(SO4)3 aluminum sulfate
O2 oxygen gas
C2H6 ethane
CO2 carbon dioxide
CH3OH methanol
CH3CHO acetaldehyde
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