To form an oxygen molecule o2 two oxygen atoms share two pairs of electrons what kind of bond is shown below by the electron dot diagram of o2

What is evidence of a physical change. A. ice melts B. silver tarnishes C. biycicle rusts

What is the percentage by mass of fluorine in sulfur hexafluoride?

If 0.0357 mol CaCl 2 is dissolved in water to make a 0.420 M solution, what is the volume of the solution?

The standard enthalpy of certain reaction is approximately constant at + 125kJmol-1 from 800K to 1500K. The standard Gibbs energy is + 25kJmol-1 at 1150K. Estimate the temperature at witch the equilibrium constant becomes greater than 1.

Equation for hydrogen

Which orbital notation represents a noble gas in the ground state

c. When we heat water up by the Bunsen burner, what temperature is the boiling water? After 10 minutes

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase