Joshua has learned that the human body is made up of many body systems that work together to function for life which of the following does not provide an example of two human body systems working together A heart pumps oxygen-rich blood from the lungs to the body B storing waste products for later illumination C  shivering in response to sensing cold D hormones are released into the bloodstream

i do not get it   at all

the answer is 0.8m.

by: nicholas

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