Which is not true for a gas chromatograph? A-the machine has a sensor that detects when the elements go through the tubing
B-your sample has to be dissolved in a liquid to be put in the machine
C-you need a large sample to test in the machine
D- the machine has a spiral of tubing to let the chemicals separate in

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o