PLEASE HELP WILL GIVE IF UR CORRECT

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

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

How many atoms or molecules are there in a mole of a substance?