On the periodic table, a "period" is A. all of the elements colored orange. B. all of the elements colored green. C. a vertical column of elements. D. a horizontal row of elements.

How many hydrogen atoms are in an acyclic alkane with 13 carbon atoms

What does messenger RNA do during protein synthesis

The burning of a sweet potato sample generates 102.5 kJ of heat. This heat was used to raise the temperature of 300 grams of water from its initial temperature of 15.5 degrees Celsius. Considering the specific heat of water is 4.

How does oxygen concentration affect the fish that live in a pond

2 O2 + CH4 CO2 + 2 H2O What mass of oxygen is required to completely react with 2 moles of CH4? 6 C 12.01 Carbon 1 H 1.01 Hydrogen 8 O 16.00 Oxygen

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?