The molecular mass for C2H4 should be: 2*12 + 4*1= 28 gram/mol. Then the amount of mol in 88.9 grams C2H4 should be: 88.9g/ (28g/mol)= 3.175 mol.
To answer this question, you need to know the reaction formula for the problem. The formula should be:
C2H4 + 3O2 --> 2CO2 + 2H2O
In the formula, every 1 C2H4 will be reacted with 3 O2. Then the amount of oxygen needed would be: 3/1 * 3.175 mol= 9.525 mol
Answer:
D. Fossils of species that no longer exist but are ancestors of current species have been found in rock layers.
Explanation:
The correct answer is bulimia nervosa.
Bulimia nervosa is an eating disorder which is characterized by binge eating and purging as a way of getting rid of the big amount of food consumed in a short period of time. Bulimia nervosa has many complications which include chronic sore throat, kidney problems, dehydration and dental problems. All of these complications are connected to the excessive vomiting and the common overuse of diuretics or laxatives and diet pills.
White blood cells remove these objects from the blood stream. Testosterone also helps remove any wastes in the blood stream