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

A reaction requires 15.0 g of ammonium chloride. What volumeof a 14% solution of NH4Cl which has a density of 1.04g/cm3 is needed to supply the 15.0 g ofNH4Cl?

What is an ""acid""? What is a ""base""?

Which of the following is not a current theory regarding global climate change? a. Global warming will stimulate crop growth. b. Even the moderate projections on global warming will cause devastation. c.

Problem page liquid hexane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water. what is the theoretical yield of water formed from the reaction of of hexane and of oxygen gas?

The pH of a solution is measured as 4.5. What is the hydrogen ion concentration of the solution? A. 4.0 * 10-5 M B. 3.2 * 10-5 M C. 4.5 M D. 3.2 * 104 M

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary

When heat is added to or removed from a substance, it may change its state. What state will most likely result if heat is added to a liquid?

Chemical Reactions Lab Procedures: 1. Place a 1cm long piece of white chalk in a clear plastic cup. 2. Add 5 mL of vinegar to the cup. 3. Record your observations. If you were performing the procedures above you would need to A.

How many moles of oxygen are in 0.53 moles of co 22?

The car wit fastest acceleration is the tempest. it has an acceleration of 6.1 m/s. suppose the car accelerates from rest to a final speed of 30. m/s. how long does it take the tempest to reach this speed?