A tank contains a gas mixture of 0.852 atm of He, 685 mmHg of O2, and 455 mmHg of N2. What is the pressure in mmHg of the gas mixture?

During which step of meiosis does crossing over occur? A. prophase I B. anaphase I C. telophase I D. metaphase I

Calculate the atomic mass (average atomic mass) of naturally occurring oxygen.

How many ribs does grandfathers skeleton have

What is true about the metals in group 1A, 2A, 3A? a) all form ions with negative charges b) all have ions with a 1 + charge c) gain electrons when they form ions d) lose electrons when they form ions

Explain how the size and shape of particles affect the attraction between them.

How many metaloides are found on the periodic table

Which of the following is considered to be a chemical property of matter?

How does percent composition by mass contribute to writing a balanced equation?

Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the a) activation energy b) number of collisions c) fraction of the reacting particles which possess energies greater than the activation energy

If you have 60 grams of MgCl2 in 5 liters of solution, what is the molarity of this solution?