The volume of oxygen gas changed from 10 ml to 11 ml as the temperature changed. is this a chemical change or a physcial change

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space