Which of the following is a chemical change? a. molten brass is poured into a mold to form a musical instrument. b. a magnet is used to take iron filings out of a mixture. c. an ice pack is shaken and squeezed and becomes cold. d. moisture in the air forms beads of water on a cold windowpane.

What is the mass of 4 molecules of co2

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided