Is burning bread a chemical or physical change

Vaccination against the flu should be required

Which of the following answer choices best describes J. J. Thomson's plum-pudding model? An atom is surrounded by a firm outer shell and contains positively charged particles in its core.

How would copper become copper (+2)

Aluminum metal reacts with iron (ii) sulfide to form aluminum sulfide and iron metal. what is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest, whole-number stoichiometric coefficients?

What is the body systems main job

Describe the charges of the subatomic particles by choosing the answer from the drop-down menu. Proton have a charge. Have a 0 charge. Electrons have a charge.

How did Alexander effect the people of Judah?

Is it possible for a molecule only made up of hydrogen and carbon to be polar?

Which of these represents a chemical change?

Why do think there is often only a short amount of time to evacuate an area before an earthquake?