Mass, air has that. Since what fills up a balloon? A gas
Shape, it has no definite shape. This one is accurate, it has no definite shape, it takes the shape of the object it's in.
Volume, does air take up space? If it does then yep. Balloon example/
Density, yes it does, because it's tightly wounded up.
D
The answer to the question is D.
Answer:
The molecular formula of estradiol is: 
.
Explanation:
Molar mass of of estradiol = M= 272.37 g/mol
Let the molecular formula of estradiol be 
Percentage of an element in a compound:
Percentage of carbon in estradiol :
x = 18.0
Percentage of hydrogen in estradiol :
y = 24.2 ≈ 24
Percentage of oxygen in estradiol :
z = 2
The molecular formula of estradiol is: 
Deoxygenated Blood enters and leaves the right side of the heart then Oxygenated blood enters and leaves the left side of the heart
Answer:
Organ systems & their main functions
Explanation:
The chest bones Rib Cage & spine - protects the vital organs (heart, lung,liver) from injury & provides structural support for body.
Skin is the body's first line of defense & keeps the body warm. In case of any invading infection, fever - body temperature rise fights it.
Circulatory system (containing heart) & its body fluid blood - transports nutrients and oxygen to body cells
Endocrine system regulates growth, produces hormones - that target organs via bloodstream.
