The mole fraction of neon in the air is about 2. 6 x 10–5. If the average molar mass of air is 28. 96 g/mol what is the concentration of neon in air in ppm?.

Abag contains even and odd numbered balls in the ratio of 3: 7, respectively. for each of the following, what is the probability of drawing an even-numbered ball? the total number of balls is 240 and 30 of the odd-numbered balls are renumbered by multiplying the numbers by 4.

To safely control the traffic flow and protect workers near public roadways and moving construction equipment use you could use

How was the sat? what type of questions for math, writing and reading. did anyone get a near perfect score and if so how long did it take to study. i am very stressed and want to get at least a 1450.