True or false a substance that undergoes a physical change is a different substance with different properties after the change.

The family of elements that has a 2 - oxidation number is the:

How many oranges are in 1 mole of oranges?

What is a similarity between an atom and a cell?

What is the electronegativity in the determination of the ionic or covalent character of a bond

what is the excess reactant for the following balanced equation when 13 moles of ALF3 are mixed with 9 moles of O2

Make a list of physical changes and chemical changes that you observe or see effects of in the school

Which equation obeys the law of conservation of mass? H2 (g) + O2 (g) → H2O (g) H2 (g) + O2 (g) → H2O (g) + 4He (g) 2H2 (g) + O2 (g) → 2H2O (g) H2 (g) → H2O (g) H2 (g) + O2 (g) → 2H2O (g)

Which statement is true about sodium chloride (NaCl) ? It is a salt because it decreases the concentration of metallic ions. It is an acid because it is formed by the reaction of a salt and an acid.

After pyruvate oxidation, the chemical energy of how many carbons of the original glucose molecule is converted to chemical energy in the form of atp in the remaining steps of cellular respiration?

What do you call all elements that are clearly not metals? ? nonmetals ? metalloids