If an atom has 17 protons, 15 neutrons, and 19 electrons, what is the atom's electrical charge?

if lance armstrong is riding his bicycle at speeds of 15 m/s, how long will it take him to travel 81.9 meters?

Given that the k sp for caf2 at 25°c is 3.9 * 10-11, will a precipitate form when 0.10 l of 2.3 * 10-4 m cacl2 is added to 0.50 l of 5.0 * 10-3 m naf? assume volumes are additive.

How is the periodic table arranged (give two ways)

Which of the following shows the abbreviation for an SI unit of density? A. lb/mL B. g/cm3 C. L/kg D. kg/m2

How many moles in 43 liters of co2 at stp?

A farmer uses water to irrigate his potato crops. Which roles of water does this examplify

How was helium first discovered?

When is alpha particle emission most likely to occur? A. When the nucleus has more than 83 protons. B. When the ratio of neutrons to protons in the nucleus is too high to be stable. C. When the nucleus has a mass of more than 83 amu. D.

Researchers used a combustion method to analyze a compound used as an antiknock additive in gasoline. A 9.394 mg sample of the compound yielded 31.154 mg of carbon dioxide and 7.977 mg of water in the combustion.

The formula for binary ionic compound formed between cesium and fluorine