Question

plz answer atleast 2 question.
it's urgent please

Answer 1

your answer is 2 2h means 2 atoms of hydrogen and h2 means two molecules of hydrogen

Answer 2

✒️It is the answer of questions 2

✏️H2 is Molecular hydrogen. It is a molecule of hydrogen that consists of two hydrogen atoms bonded together by one single bond (also known as a sigma bond). A subscript also denotes how many of a particular atom is in a molecule, thus H2 has two hydrogens. 2H, on the other hand, denotes two moles of elemental hydrogen

✒️It is the answer of question 3

✏️CO2 means there is one molecule of carbon di oxide and 2CO2 means there are 2 moleucles of carbon di oxide