The diagram above is a potential energy curve for a reaction which number represents the effects of a catalyst from the reaction

Cobalt-60 is a radioactive isotope used to treat cancers of the brain and other tissues. A gamma ray emitted by an atom of this isotope has an energy of 0.700 MeV (million electron volts; 1 eV = 1.602 * 10-19 J).

If an atom of iodine gains one electron it will have the same number of valence electrons as which of these elements

In 1865 a pond was surrounded by open fields today the same area is swampy and surrounded by a forest which process is responsible for this change?

Which of the following can be classified as a mixture? a pure air b pure water c pure nitrogen d pure gold

Given the electronegativities below, which covalent single bond is most polar? element: h c n o electronegativity: 2.1 2.5 3.0 3.5

What is demetri mendeleyev given credit for developing

Acetone used for rinsing glassware Group of answer choices 1. Pour it down the sink where you are rinsing the glassware 2. Collect it and dispose of it in the organic or acetone waste container 3.

Suppose a 500. mL fiask is filled with 1.8 mol of Cl 2, 0.60 mol of HCl and 0.40 mol of CCl4. The following reaction becomes possible: ci2 (g) + CHCİ 3 (g) - HCI (g) + CC, (g) The equilibrium constant K for this reaction is 5.

What combination of factors can change dry ice into a liquid

Rob is conducting an experiment in which he measures a person's body temperature in response to changes in air temperature. What is the independent variable that is manipulated in the experiment?