Calculate the percent by mass of each element in ammonium carbonate. (show swap and drop for writing formula)

What is the percentage of hydrogen in nitrogen trihydride

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

The biosphere of the earth is made up of what compound? organic or inorganic?