Ans: Chemistry Q&A: PF3, CO3^-2, NF3, Gas Volume, Ag2CrO4, Molar Volume

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The discussion focuses on key chemistry concepts including the Lewis structure of PF3, resonance forms of CO3^-2, bond angles in NF3, gas volume calculations, and the formula weight of silver chromate (Ag2CrO4). The Lewis structure of PF3 indicates that the phosphorus atom has one nonbonding and three bonding electron pairs. There are three equivalent resonance forms for CO3^-2. The bond angle in NF3 is slightly less than 109.5 degrees. The molar volume of gas at STP is 22.4 L, and the formula weight of Ag2CrO4 is 331.73 amu.

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  • Understanding of Lewis structures in molecular chemistry
  • Knowledge of resonance structures and their significance
  • Familiarity with gas laws and calculations involving molar volume
  • Basic knowledge of molecular weights and how to calculate them
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  • Study the concept of resonance in molecular structures
  • Learn about gas laws, specifically the Ideal Gas Law
  • Explore the calculation of molecular weights for various compounds
  • Investigate the significance of bond angles in molecular geometry
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#1) The Lewis structure of PF3 shows that central phosphorus atom has ___ nonbonding and ___ bonding electron pairs.
#2) How many equivalent resonance forms can be drawn for CO3^-2? (carbon is the central atom)
#3) The bond angle in NF3 is slightly less than ___?
#4) Sample of gas (1.3mol) occupies ____L at 22 celsius and 2.5 atm.
#5)The formula weight of silver chromate (Ag2CrO4) is ______ amu
#6) The molar volume of gas at STP is _____ L.
 
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