What is an example of a chemical change? A. water evaporating from a puddle B. cloth tearing when pulled C. wood forming sawdust when cut D. bread baking in an oven

How do changes in temperature at constant pressure affect the distance between gas particles? a. the motion of gas particles decreases as temperature increases. b. a decrease in temperature increases the distance between gas particles. c.

Which of the following is one way that nuclear reaction different from chemical reaction

Calculate the molecular mass or formula mass (in amu) of each of the following substances: (a) BrN3 amu (b) C2H6 amu (c) NF2 amu (d) Al2S3 amu (e) Fe (NO3) 3 amu (f) Mg3N2 amu (g) (NH4) 2CO3 amu

What is the pH of a 2.5 x 10-5 M solution of HCI?

Consider the perbromate anion. What is the central atom? Enter its chemical symbol. How many lone pairs are around the central atom? What is the ideal angle between the bromine-oxygen bonds?

Electron configuration for iron?

Explain how melting is considered endothermic

In the process of covalent bonding, atoms share electrons. This means that * a) Electrons from each atom are attracted to the nucleus of both atoms b) Protons and neutrons attract c) Atoms lose electrons and become ions d) Atoms gain electrons and

Give the full atomic symbol for an atom that has 30 neutrons and an atomic number of 25

Maxwell, a russian scientist, created an early peridoc table of the elements. true or false