شرح للكيمياء و أسئلة مراجعة

[sodelicious]

بكره الامتحان وبدأ الـ ((مغص))
عندي سؤال في تست بانك الدكتورة اكرام حق شابتر 5
سؤال 7 و 8 ممكن تشرحولي كيف ينحل لأني ماعرفت
7. A mixture of three gases has a total pressure of 1,380 mmHg at 298 K. The mixture is analyzed and is found to contain 1.27 mol CO2, 3.04 mol CO, and 1.50 mol Ar. What is the partial pressure of Ar?

A. 0.258 atm
B. 301 mmHg
C. 356 mmHg
D. 5,345 mmHg
E. 8,020 mmHg



8. A sample of hydrogen gas was collected over water at 21C and 685 mmHg. The volume of the container was 7.80 L. Calculate the mass of H2(g) collected. (Vapor pressure of water = 18.6 mmHg at 21C.)

A. 0.283 g
B. 0.572 g
C. 0.589 g
D. 7.14 g
E. 435 g