Why can water birds drown if they still have detergent on their feathers? Here i answered my own question for those who would like to know:
Detergent contains surfactants that remove dirt from a surface, bird feathers naturally contain an oil produced from the bird that allows the feathers to be waterproof. The surfactants also allow the detergent to mix with water, without surfactants the soap would just roll with the water. Since the natural oil is on a surface, bird feather, when the bird goes into the water, the detergent will mix with the water taking the oil with them. Therefore, the feather will no longer be waterproof and will absorb water which will be catastrophic for them and they could drown. If not drown, the extremely cold water could get in contact with the skin and they could lose body heat and die from that.

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.

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

no starving yourself won't it will make you lose more weight what you need to do is find out what foods make you gain weight like bread and meats with fat on