An unknown gas diffuse faster than nitrogen but more slowly than methane. What you can say about it's relative molecular mass?​

In apex! a liquid heated beyond a certain temperature becomes

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

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