If there are 6.73 x 1027 atoms of iron, how many moles of iron

are present?

Sodium salicylate late is made from carbon dioxide and sodium phenoxide. identify each of these substances as a reactant or a product

Which definition of heat is most scientifically accurate? the temperature of the thermal energy in an object the movement of thermal energy from one place to another a measure of the thermal energy in matter how hot or cold something is

Aqueous ammonia is commercially available in a solution that is 28% by mass ammonia. What is the mole fraction of ammonia in such a solution?

Why is there a need for increased recycling to preserve phosphorus

A pH increases, what happens to the hydroxide ion concentration? A) It decreases B) It equals the pH number C) It increases

Butter is melted in a pan. Which of the following is true about the change? Select one: a. It is a physical change that absorbs energy. b. It is a physical change that releases energy. c.

The freons are a class of compounds containing carbon, chlorine, and fluorine. while they have many valuable uses, they have been shown to be responsible for depletion of the ozone in the upper atmosphere.

Write its complete chemical symbol including mass number, atomic number, and net charge (if any).

How would you be able to use the spectrum of each gas to establish its identity

Which does not add to the reliability of a scientific source of information? displaying data in a colored chart clearly identifying the sources of the data explaining how the data was collected showing that many scientists had reviewed the