How would a system in which both matter and energy are exchanged freely between the system and the surroundings be classified?

How many oxygen are present in 2.50 mol of oxygen atoms?

The aluminum foil on a certain roll has a total area of 18.5 m squared and a mass of 1275 g. Using density of 2.7 g per cubic centimeter for aluminum, determine the thickness in millimeters of the aluminum foil.

Write the electron configurations of cu2 + and ag+. is each electron configuration consistent with the color you observed for each cation? explain.

How many oxygen atoms are in 17.63 grams of co2?

What is the ph of a 7.5*10^-3 m H + solution

What is a scientific explanation for a range of hypotheses and observations supported by testing

A chemical reaction involves the rearrangement of atoms to form new molecules. During a chemical reaction, however, atoms are neither created nor destroyed. Which of the following is true about the atoms involved in a chemical reaction? A.

What is the new concentration, after diluting 300 mL of a 1.5 M LiCl solution to 1L

The answer that he gave was wrong

In which orbital does an electron in a bromine atom experience the smallest?