Smallest to largest: biome, population, organism, ecosystem, community

A chemist prepares a solution of aluminum sulfite by measuring out 109 umol of aluminum sulfite into a 350 mL volumetric flask and filling the flask to the mark with water.

How heat moves from one end of a solid to the other

Which of the following combinations will result in a reaction that is never spontaneous? positive enthalpy change and positive entropy change positive enthalpy change and negative entropy change negative enthalpy change and positive entropy change

Which of the following best describe an atomic number? An element identity is defined by its atomic number this means it represents the number of

A mineral is observed to become soft and crumbly and develop a reddish color as it undergoes weathering, what process has most likely taken place?

What is the ideal gas constant? A. It is a constant that applies only at STP. B. It is a specific constant for a particular gas. C. It is a universal constant used for all gases. D. It is a constant that depends on the conditions.

The greenhouse effect is a result of the Sun's energy being absorbed by objects on the Earth and converted into which type of radiation? A) Radio B) Visible C) Infrared D) Ultraviolet

Which was the limiting reactant: the zinc or the hydrochloric acid? Remember that the limiting reactant is completely consumed in a reaction and no new product is formed unless more of the limiting reactant is added.

How many moles are in 4,55 X 10^23 molecules of CO2 (rounded)

In standardization of NaOH solution, a student found that 25.55cm3 of base neutralized exactly 21.35cm3 of 0.12M HCl. Find the molarity of the NaOH.