Both of calciums electrons are in its innermost shell. Explain why.

What is the chemical formula for ammonium nitrate?

In which of the following situations is heat transferred from the source to popcorn kernels by the method of conduction?

The vapor pressure of diethyl ether (ether) is 463.57 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is aspirin. Calculate the vapor pressure of the solution at 25 °C when 14.88 grams of aspirin, C9H8O4 (180.

Is the study of the muscle movements in the human body an example of biology or physics

How is a pure substance different from a mixture? A. Mixtures can be seperated by physical means. B. Pure substances are made up of mixtures. C. A pure substance is heterogeneous. D. A mixture is made of one substance.

A cylinder contains oxygen at a pressure of 10.0 atm and a temperature of 300.0 K. The volume of the cylinder is 10,000 mL. What is the mass of oxygen gas?

4 - explicar as mudanças de estados fisicos da materia 6 - definir e exemplificar: -Ligações iônicas ou eletrovalente -Ligações covalentes ou molecular 7-definir substancias puras e suas clasificações 8-definir e exemplificar misturas homogeneas e

What ion forms when an acid is dissolved in a solution?

Suppose you found a material in which 12.5% of the original radioactive atoms were present. if the half-life is 47 years, how old is the material?

How many neutrons does xenon have?