Aquantum of energy is the amount of energy required to do what

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent