When the equation Fe + O2→Fe2O3 is balanced, the coefficient for O2 is:

a. 4

b. 3

c. 1

d. 2 D?

A child running 1.5m/s slides for. 3s and slows down to 1.1m/s what is the acceleration during the slide?

What is the main function of nitrogen in the atmosphere

What organisms appeared on Earth First? a). gastropods b). horn corals c). brachiopods d). crinoids

If 1.00 mol of argon is placed in a 0.500-l container at 22.0? c, what is the difference between the ideal pressure (as predicted by the ideal gas law and the real pressure (as predicted by the van der waals equation? for argon, a=1.

What percent of magnesium bromide, MgBr2, is magnesium?

Calculate Zeff for the 4s electron in a copper Cu

And the cell potential is - 54.0 mv (inside negative), calculate the maximum ration of

What is the final ph of a solution created by adding 12 ml of 0.5 m hcl to 300 ml of 100 mm formate if the pka for formic acid is 3.78?

Imagine that an uncharged pith ball is brought into the electrostatic field of a charged rod. The side of the pith ball closest to the negatively charged end of the rod will

When forces attracting solvent particles to each other are broken, what is provided for a solution? energy for the solute to precipitate space for the solute in the solvent inertia for the solute to move into the solvent nothing is provided