Over time, an iron nail reacts with water to produce iron oxide, or rust. Which of the following is a signal that rusting has taken place?

Describe the interactions between molecules in a mixture (analyte), the stationary phase and various mobile phases used in column chromatography and the effect of these interactions on the separation of the mixture.

A substance is composed of only one kind of atom cannot be separated into simpler substances are converted into another substance by chemical processes which category would you classify the substance

Which of the following is not a type of radiation? A. trans-radiation B. inhaled radiation C. terrestrial radiation D. cosmogenic radiation

Write the balanced molecular equation for the neutralization reaction between hi and ba (oh) 2 in aqueous solution. include physical states.

The fact that same molecules of matter have been around for years is supported by

What larger energy does light energy come from?

Allows water to pass through easily

Which is a cause of desertification? A. farming B. creating reservoirs C. overgrazing D. driving motor vehicles

What happens when the threat of exposure to dirty air is reduced in a community? There is enough oxygen available for people's lungs to function normally The amount of indoor air pollutants released during a fossil fuel burn decreases There is a

Is chicken noodle soup an element, a compound, a homogeneous mixture, or a heterogeneous mixture?