Which of the following elements do living things have that volcanic rocks do not have?

Oxygen

Silicon

Magnesium

Carbon

State the law multiple proportions

What is the nuclear binding energy of an atom that has a mass defect of 5.0446 10-29 kg? Use E = mc2. (Remember: The speed of light is approximately 3.00 108 m/s.) 5.61 10-46 J 1.51 10-20 J 4.54 10-12 J 1.78 1045 J

A. Use the half-life of carbon 14 to find the value or the parameter b, and plot the function. b. If 90 percent of the original carbon 14 remains, estimate how long ago the organism died? c. Suppose our estimate of b is off by - 1 percent.

Consider the following reactions. (Note: (s) = solid, () = liquid, and (g) = gas.) V2H2 (g) + 1212 (9) - HI (g), AH = + 6.2 kcal/mole 21.

If there are 4 grams of product produced by the chemical reaction, how many grams of reactant were consumed?

How many chemical bonds do you expect ekasilicon to have and why

Express the rate of reaction in terms of the change in concentration of each of the reactants and products. 2A (g) → B (g) + C (g)

A type of element that has some of the properties of metals and some of nonmetals is called a

DDT is: A. banned in the United States B. still being used in other countries C. to blame for the near extinction of some bird species D. all of the above

7) Sodium is much more apt to exist as a cation than chlorine because: a) chlorine is a gas and sodium is a solid b) chlorine has a greater electron affinity than sodium c) chlorine is bigger than sodium d) chlorine has a greater ionization energy