Eli walks fue east for 5.5 blocks and the turns due north for 8.0 blocks. what is the resultant displacement? a.13.5 blocks north b. 13.5 blocks northeast c. 9.7blocks northeast d. 9.7 blocks southwest

consider east-west direction along X-axis and north-south direction along Y-axis.

A = displacement along east direction = 5.5 i

B = displacement along north direction = 8 j

R = resultant displacement

Resultant displacement is given as

R = A + B

R = 5.5 i + 8 j

using Pythagorean theorem , magnitude of the resultant displacement is given as

|R| = sqrt(|A|² + |B|²) = sqrt((5.5)² + (8)²) = 9.7 blocks

  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

i'm on my way to history not a mistory.