What type of reaction is

P4 + 3O2 → 2 P2O3

single-replacement

double replacement

synthesis

decomposition

The Old Man in the Mountain was a natural rock formation in a cliff in the White Mountain in New Hampshire that became a symbol for the state. On May 3, 2003, the symbol came crashing down.

A sample of a radioactive isotope initially contains 20 x 10^10 atoms. After 16 days, 5 x 10^10 atoms remain. what is the half-life of the isotope? A) 12 days B) 20 days C) 10 days D) 16 days E) 8 days

Which example is classified as a body fossil? fossilized bird droppings footprint of a stone-age individual ancient shark vertebra a worm trail

What determines all the star's properties such as its temperature, size, brightness and life span? a. temperture b. Mass c. age d. brigthness

What is the mole mass of BaBr2?

If a plane is traveling300 mph how long will it take to travel 1800 miles

How do you get friends

Determine the number of grams of NaCl necessary to make up 100 mL of a 0.10 M solution. 0.017 g 0.58 g 1.7 g 58 g

What causes an increase in the average global temperature?

Which of the following is true regarding nuclear fission and nuclear fusion? A. Both of these processes can provide energy. B. Our sun's heat is an example of both of these processes. C. Both of these processes are equally complex to control. D.