PLEASE HELP ME. I NEED THE ANSWER SOON. SHOW ALL YOUR STEPS, ON PAPER IF POSSIBLE. A 5.00 g sample of borax (sodium tetraborate decahydrate, Na2B4O7 * 10H2O) was thoroughly heated to remove all the water of hydration. What mass of anhydrous sodium tetraborate remained? [5]

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