When an equation is balanced what is the same on both side?

In a combustion reaction of C3H8 + 5O2 = 3CO2 + 4H2O, how do you know that the first compounds will produce the nuber of what they did?. Also how do you know that this 2Ca + O2 = 2CaO?

Is fermenting wine a chemical or physical change?

The atom is the basic unit in chemistry. An atom contains neutrons, protons, and electrons. Neutrons are neutral, protons have a positive charge, and electrons have a negative charge.

Which of the following tools could have become cross-contaminated during the experiment if you had not cleaned them carefully between successive tests? A. Spoon B. Beaker C. Stirring Rod D. Graduated Cylinder E. Distilled water in a spray bottle

All solids have an orderly internal structure with repeating bonding patterns between atoms, ions, or molecules. a. True b. False

What is mitosis in a living cell?

Which of the following statements is true? A. Some chemical reactions release energy, and other chemical reactions absorb energy. B. Chemical reactions, by definition, cannot absorb or release energy. C.

4 Properties of Bases?

Which statement best describes the intermolecular forces between N2 molecules and NH3 molecules in the solid phase? A.

How many grams of water are needed to react with 485 g of calcium carbide