Name and describe three of the five branches of chemistry.

Which of these is a molecule? a. Ca c. Na b. Mg d. H2O

Cube edge length is 3.23 all sides what is the volume

Explain how are elements classified and provide an example

Calculate the standard enthalpy change for the following reaction at 25 degrees Celsius. MgCl2 + H2O--> MgO + 2HCl

The basic atom has a neutral charge. True or False

The changing of gas to liquid

A very simple assumption for the specific heat of a crystalline solid is that each vibrational mode of the solid acts independently and is fully excited and thus cv=3NAkB=24.9 kJ / (kmol⋅K). This is called the law of Dulong and Petit.

How many elements are found in the following chemical equation? K + Cl → KCl A. 1 B. 2 C. 3 D. 0

How many liters of 0.85 M HCl solution would react completely with 3.5 moles Ca (OH) 2?

The specific heat of aluminum is 0.897 J/g•°C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°C to 29°C? A. Q = 0.75 g x 0.897 J/g•°C x 22°C B. Q = 0.75 g x 0.