four gases were combined in a glass cylinder with these partial pressures:3.5 atm N2,2.8 atm, 0.25 atm At and 0.15 atm He. What is the mole fraction in the mixture? What is the mole fraction of Ar in the mixture?

Elliptical galaxies often appear reddish due to an abundance of

Hypothermic body temperature can range from 28.7 °C to 35.5 °C. What is this range in degrees Fahrenheit?

Coal can be classified as which type of rock?

Name three of the most sensitive parts of your body (Appropriate parts. Ex: finger, wrist, shoulder, etc.)

A high concentration of hydrogen ions means a solution of what? A. very acidic B. very basic C. neutral D. neither acidic or basic

Something occurs when a liquid changes to a gas below its surface as well as on the surface

What happens to the reaction c2h6 + 137 kj when the temperature of the reaction is increased?

If a car is going at a speed of 36 km/hr. what is the speed in m/s

You want to create 14.0 g of copper to meld into a piece of jewelry. You know that when copper (II) chloride reacts with aluminum, copper is a product. How much aluminum would you need to start your reaction with to get 14.

What happens to electronegativity values when moving from left to right across the period in the periodic table