2. A student was using a compound microscope and damaged the slide by moving the high power lens into it. The mistake the student most likely made was
A. putting the slide in the wrong place on the stage
using the fine-adjustment knob with the high power objective lens
C. using the coarse-adjustment knob with the high power objective lens
D. using the course-adjustment knob with the low power objective lens

pls help needs to be in by today :((

answer: lol

explanation:

lol

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