Atrain travels at a speed of 30 miles per hour. if 1 mile = 1.6 kilometers, how fast is the train traveling in kilometers per minute?
a- 1.0 km/min
b- 0.4 km/min
c- 0.8 km/min
d- 0.6 km/min

The answer 
 the speed of the train traveling in kilometers per minute can be found by using the following method:
v = 30 miles per hour
1 mile = 1.6 kilometers

just do the calculus by changing miles to kilometers
 1 mile = 1.6 kilometers, so 30 miles= 1.6 km x 30 = 48 km
 so the speed of the train is
v=30 miles / hour = 48km / h = 48km / 60 mn  = 0.8 km/ mn
the answer is
C- 0.8 km/min 

Since there is the same amount of agn03 in both silver chloride and silver nitrate they produce the same amount of moles. therefore silver chloride produces the same amount of silver nitrate, so your answer is 15.0 moles of silver nitrate. i hope this !