Approximately how many moles of N2 are in 200 moles of clean dry air?

An atom has the following electron configuration. 1s22s22p63s23p64s23d3 How many valence electrons does this atom have? A. 2 B. 3 C. 5 D. 11

A 200 L balloon is blown up inside at 100 K. It is then taken outside in the hot sun and heated to 400K. What is the new volume?

Describe an acid or base in terms of its relationship to protons

76. Which of the following choices is not an example of an adaptation? A. Nocturnal animal species have large eyes. B. One member of a wolf litter is born with shorter legs than its siblings. C.

What do you think about our current forms of recycling? Why?

Which of Deeandra observation is scientifically testable

A round, three dimensional object is a?

The energy needed to start a chemical reaction is called

How does the motion of particles in the sun's plasma compare to the motion of particles in a solid? particles in both the plasma and a solid move around to fill available space.

What is the molarity of a solution containing 45.78gMgCl2 dissolved in 3.00L of solution?