Air is about 78% nitrogen gas (n2) by mass. The molar mass of nitrogen gas is 28. 0 g/mol. A 100. 0-g sample of air contains how many moles of nitrogen? 2. 8 3. 6 28 78.

These three organisms are interdependent on each other for their survival. what will happen if foxes are eliminated from the region? a. there will be more rabbits and less grass in the region. b. there will be more grass and fewer rabbits in the region. c. there will be fewer rabbits and less grass in the region. d. there will be more rabbits and more grass in the region.

He did chinese culture change during the warring states period

Compared with the cost of tuition, fees, and books for a traditional college course, the cost of a clep exam is: