True.........................
Answer:
See the explanation below
Explanation:
From the balanced equation of photosynthesis:
6 moles of CO2 is required to produce 6 moles of oxygen.
Assuming that 5.2 g of CO2 reacts with water,
mole of CO2 = mass/molar mass = 5.2/44.01 = 0.1182 mole
Hence,
0.1182 mole of CO2 will yield 0.1182 mole of O2.
Mass of oxygen that will be produced from 5.2 g of CO2:
= molar mass of O2 x mole of O2
= 0.1182 x 16
= 1.9 g of O2.
<em>Note: Because the mass of CO2 is in two significant figure, the final answer was adjusted to be in two significant figure. The mass of oxygen can be computed depending on the mass of CO2 involved.</em>
Answer:
the water is displaced weighed more than the boat
Answer:
C) Release of von Willebrand factor (vWF) from the endothelium, not the epithelium.
Explanation:
Hemostasis is the physiological process of reparation and maintenance of a blood vessel to stop excess loss of blood in case of vascular injury. This process occurs in four stages:
- Vascular Injury i.e. a breach in the endothelial barrier. This results in the dislodge of endothelial cells, exposing the collagen fibers underneath.
- Vascular constriction or vasoconstriction is the constriction of the blood vessels to prevent excessive blood loss.
- Platelet plug formation involves the aggregation and adhesion of platelets to the endothelium.
- Coagulation
Platelet plug formation occurs by the adhesion of circulating platelets to the collagen fibers that have been exposed by dislodging of the endothelial cells. The endothelium, as well as the platelets release a ligand known as the von Willebrand factor (vWF). This molecule acts as a relay or bridge between the integrin receptors on the platelets and the exposed collagen fibers.
Platelets also release chemicals to attract more platelets to the wound site, resulting in more vWF release. This results in more and more platelets adhering to the endothelium, leading to platelet plug formation.