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A packet of stoichiometry problems for students who do not have access to technology for distance learning. It includes calculations for determining the amount of a substance needed based on given amounts of another substance, as well as explanations for each step of the calculation. The packet covers the reactions of lead iodide and ammonia, and includes questions related to molar mass, mole ratios, and Avogadro's number.
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If you are a student that HAS access to technology, this is not the packet for you. This packet is for students who pick up and drop off their work at the front office every week. If you have access to technology, please go back to your teacher’s website and complete the correct assignment. Name: _____________________________________________ Period: ____________ Teacher: ____________________________
If you have internet access, there is a video on my website explaining these notes! When potassium iodide (KI) is mixed with lead nitrate (Pb(NO 3 ) 2 ), a yellow solid is formed. This yellow solid is lead iodide, PbI 2. Lead iodide used to be used as a pigment in yellow paint, but is now used to detect gamma and x-‐rays. 2 KI + Pb(NO 3 ) 2 à PbI 2 + 2 KNO 3 Molar Mass KI: 166.0 grams = 1 mol Molar Mass Pb(NO 3 ) 2 : 331.22 grams = 1 mol Molar Mass PbI 2 : 461.0 grams = 1 mole Molar Mass KNO 3 : 101.11 grams = 1 mole
Before you begin, make sure you have completed assignment 8.1. Please show your work. You must show your work in order to receive full credit. Use the mole Island Graphic Organizer (Page ) to guide you. A partial answer key is also included for you. YOU MUST SHOW YOUR WORK TO RECEIVE FULL CREDIT!!!
1. If I want to make 3.00 moles of H 2 O, how many grams of C 3 H 8 do I need?