Iron nails are often coated with paint or zinc to reduce rusting. Iron usually rust when getting in contact with which of the following?

CO2

H2

N2

O2

Calculate the energy if 48.7 g of Al reacts in the following reaction. (Al = 26.98 g/mol) Fe2O3 (s) + 2 Al (s) →Al2O3 (s) + 2Fe (s) ∆Hrxn = - 852 kJ.

In this redox reaction, identify the oxidizing agent. 2Li + F2 → 2LiF

Write the quantities 3 * 10^-4 cm and 3 * 10^4 km in ordinary notation

Which piece of information is not necessary to calculate the force of gravity between two objects, A and B? A. The mass of object A. B. The mass of object B. C. The velocities of A and B. D. The distance between A and B.

If 1.12 g of phosphorus acid were dissolved in 100.0 mL of H2O. What is the concentration of the solution in molarity?

A 25 N and 5 N force pull to the right. Friction is 10 N. If the object is 5 kg, find the net force and acceleration.

What properties of matter are intensive independent of their size

What is the density of an object having a mass of 8.0g and a volume of 25cm3

What is a Cilla? (In drawing)

Which term names the group of organisms able to interbreed and produce fertile offspring?