What is the pH of a 3.9•10-8 M OH - solution

O átomo de Rutherford (1911) foi comparado ao sistema planetário (o núcleo atômico representa o sol e a elestrosfera, os planetas). A Eletrosfera é a região do átomo que: a) Contém as partículas de carga elétrica negativa.

At what temperature will a fixed amount of gas with a volumeof 175L at and 760 mmHg occupy a volume of 198 L at apressure of 640 mmHg ?

The period of time that occurred from about 4 to 2.5 million years ago is called the?

The rate at which energy is transferred is called a. joules. b. power. c. work. d. time.

The prefix 'mili' - means a thousandth. So a mili-liter is a thousandth of a liter. 1 mililiter = 1/1000 liter, How many liters is 1,939 mililiters? Round your answer to the nearest tenth of a liter.

What kind of chemical bond does salt have?

How does phosphorus enter the human body?

When a reaction occurs between atoms with ground state electron configuration 1s2 2s1 and 1s2 2s2 2p5 the predominant type of bond formed is

How does heat transfer takes place between any two systems?

Hydrate name of CaCl2 * 8 H2O