b. The trains have a top speed in a straight line of 20ms-1. In order to ensure that passengers are comfortable, the acceleration and deceleration of the trains are limited to 3ms-2. i. The route is counterclockwise starting from stop A and remains stationary at each stop for 2 minutes. Assuming that the train's acceleration/deceleration is constant, calculate the time taken to reach each stop - including the time taken to go back to stop A. Marks -5 a HT I 0.5km KE 0.5km 10.5km 0.75km ° 0.4km 2km R=75m 0.5km 0.5km

hèllo, sorry i really need some more points so if you need this qustion answered than retype it

  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

the answer is a. hope this .