An electrically neutral atom of gallium has 31 electrons and 39 neutrons. what is the mass number for an atom of gallium

Describe all lab equipment which would be required if you wanted to heat a chemical to 1500ºC. Can your explain in detail?

I just pulled up to Sheetz and filled my car up with gas. Explain the transfer of energy that would occur once I start then drive my car--consider the type of energy that exists within the gas molecules, explain the transfer of form of energy as gas

Read the list of substances. Spoon, Styrofoam cup, Scissors, Pencil Which substances are likely to float in water?

What action could slow a chemical reaction rate? a. lowering the pressure b. raising the temperature c. increasing the concentration d. adding more of a substance to a mixture

How many moles of carbon atoms are combined with 11.2 moles of hydrogen atoms in a sample of the compound, C3H8?

1. Physical geography examines the culture, political systems, social systems, economic systems, and characteristics of various peoples-why they eat certain foods, practice a chosen religion, or why they select a particular mode of transportation. A.

A gas has a pressure of 2.0 atm. If the temperature decreases from 250K to 125K and the volume remains constant, what will be the resulting pressure?

Calculate the number of moles of Barium hydroxide, Ba (OH) 2, present in a 100.0 g sample.

Which type of reaction occurs in the following? 2HgO (s) - - 2Hg (l) + O2 (g) 1. a decomposition reaction in which a metal is reduced 2. an acid-base neutralization reaction to produce oxygen gas a displacement 3.

Is pulverizing an aspirin a physical or chemical process