Determine the median and the upper and lower quartiles of the set of data. 11, 21, 30, 29, 7, 26, 18, 12, 3, 10, 12, 15 a. median = 27, upper quartile = 23.5, lower quartile = 10.5 c. median = 12, upper quartile = 26, lower quartile = 10 b. median = 13.5, upper quartile = 10.5 lower quartile = 23.5 d. median = 13.5, upper quartile = 23.5, lower quartile = 10.5

a is the answer to this question

explanation:

the answer is na (sodium)

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