Give an example of where you may see heat and light produced in everyday life which is not evidence of a chemical reaction. Explain the source of the heat and light.

Whitch is a type of mining where steam beds are minded

Which of the following is the only metal that is liquid at room temperature? A. Nickel B. Magnesium C. Sodium D. Mercury

4 Compared to the energy and charge of the electrons in the first shell of a Be atom, the electrons in the second shell of this atom have (1) less energy and the same charge (2) less energy and a different charge (3) more energy and the same charge

Consider the covalent bonding in the molecule acetylene [ah-SET-ihl-een], and assume that the carbon-carbon axis is the x-axis. What two orbitals on each carbon atom participate in pi bonding?

4. How do the atomic numbers of the elements within each of Groups 1, 2, and 13-18 of the periodic table vary?

You are given a clear solution of KNO3. Using 3-4 sentences explain how you would determine if the solution is unsaturated, saturated, or supersaturated

Which element combination (s) would result in electrons being shared? [] sodium (Na) and oxygen (O) [] carbon (C) and fluorine (F) [] oxygen (O) and hydrogen (H) [] aluminum (Al) and chlorine (Cl)

If you start with 4 moles of iron and 3 moles of oxygen to produce iron oxide, what is the limiting reagent? (You will need to balance the equation first.) Fe + O2 - > Fe2O3

Is burning wood a physical change

A gas is located inside a closed container. if the gas is allowed to occupy more volume inside the container, what will happen to the pressure? (note: there is no gas added to the container.)