a gaseous mixture of o2 and n2 contains 37.8% nitrogen by mass. what is tht partial pressure of oxygen in the mixture if the total pressure is 745 mmHg

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Put these processes of the water cycle in the correct order, starting at the point where the water is in the lake: 1. water evaporates into the atmosphere 2. rain, snow, or other precipitation falls 3. water collects into larger bodies of water 4. water vapor condenses into liquid water

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .