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2. Sidewalk
Position A
1
Position B
A. Imagine you are a pedestrian waiting on the sidewalk to be picked up (Position A) and you notice a sports car speed
down the street. In detail, describe the motion of the car as it passes you.
B. Imagine you are a pedestrian on the opposite side of the street (Position B). In detail, describe the motion of the
car as it passes you.
C. What frame of reference is used to help describe what you see from Positions A and B? Explain your reasoning.
3. Create your own scenario (use the web as a resource), with visual (post or draw an image), and describe what you
see based on a frame of reference.
Frame of Reference

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz