Is a banana turning brown when it is left on the counter a physical change?

Scientific knowledge in order

N2 (g) + 3H2 (g) - - >2 NH3 (g) The equation above is the equation for the Haber process. If 2.0 moles of nitrogen are available for a reaction, what amount of hydrogen represents the correct stoichiometric ratio?

What is the molality of a solution made by dissolving 137.9g of sucrose in 414.1g of water?

How many electrons are in the second energy level of an atom of each element

What is the oxidation number of nitrogen in N2O? 0 + 1 + 2 + 4

Which of the following statements about transition metals is true? a. They are never found uncombined in nature. b. They include familiar metals such as gold, silver, copper, and nickel. c.

Elements can be separated from one another. Question 6 options: True False

One gram of lipid yields about 9kcal of energy. that is due to the high abundance of which chemical element?

Which of the following happens during a chemical change? Check all of the boxes that apply 0 One atom or more changes into atoms of another element. New substances with different properties are formed. O Solids, liquids, or gases may form.

The energy derived from the movement of H + ions down an electrochemical gradient from the intermembrane space into the matrix is used to drive the synthesis of ATP. How many H + ions must be moved into the matrix for the synthesis of 1 ATP?