How many protons, electrons and neutrons in F-?

A runner has a mass of 75 kg and a speed of 10 m/s. What is her kinetic energy? (KE = 1/2mv2)

Matter only moves if a force pushes or pull it true

A series of lines involving a common level in the spectrum of atomic hydrogen lies at 656.46 nm, 486.27 nm, 434.17 nm, and 410.29 nm.

Ammonia can also be synthesized by this reaction: 3h2 (g) + n2 (g) → 2nh3 (g) what maximum amount of ammonia in grams can be synthesized from 25.2 g of n2 and 8.42 g of h2? express your answer in grams to one decimal place.

Despite its very low K value at room temperature this reaction is widely used in industry to convert iron oxide into iron metal at very high temperatures. In fact, more than 100000000 tons of iron is made this way annually.

A fire extinguisher is labeled b-i. what type of fire will be put out by this extinguisher?

The capacity of an eye dropper would be a few a kilometers be leiters C deciliters d milliluters

2C 2 H 6 + 7O 2 * **>4CO 2 + 6H 2 O if 7.0 g of C 2 H 6 react with 18 g of O 2, how many grams of water will be produced

22 days converted into how many seconds?

How do you do percent composition in chemistry?