What are the three main classes of elements? Provide two physical properties for each class of elements

What role do glucose and oxygen play in cellular respiration? They are reactants because they are present before the reaction. They are reactants because they are present after the reaction.

Something with a density greater than 1.00 g ml

Which pair of substances would most likely result in the production of a gas when reacting with an acid?

Salt seems to dissappear when it is poured into water. Use mixture, solution, and dissolve to explain what happens.

A gas occupies 12.3 liters at a pressure of 40.0 mm Hg. What is the volume when the pressure is increased to 60.0 mm Hg?

Heat that flows by conduction is the transter of thermal energy between substances in contact. What must occur for this to happen? The two systems must be the same temperature, The two systems must not be touching each another.

What piece of information connects mass and moles?

What relationship can be seen in an element's placement within a group and its electron configuration?

Which of the following is true concerning atoms? A. Atoms are made of even smaller substances called subatomic particles B. The properties of atoms cannot be measured or observed

Intermolecular forces as a whole are also known as