What Is the Mole Fraction of Urea,CO(NH₂)₂,in a Solution Prepared

question 111

Multiple Choice

What is the mole fraction of urea,CO(NH₂) ₂,in a solution prepared by dissolving 4.0 g of urea in 32.0 g of methanol,CH₃OH?

• A)0.89
• B)0.11
• C)0.063
• D)0.94
• E)0.19

---

Definitions:

Thrombin

An enzyme in blood plasma that causes the clotting of blood by converting fibrinogen to fibrin.

Phagocytotic Cells

Cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells.

Monocytes

A form of leukocyte crucial to the immune system, as it evolves into macrophages and dendritic cells.

Neutrophils

A type of white blood cell that helps the body fight infections by engulfing and destroying bacteria and fungi.