In the formula H2SO4, how many atoms are there?

The number of each kind of atom in the reactants of a chemical reaction is

A reaction in which one element is substituted for another in a compound is called a(n)

The minimum amount of energy required to start a chemical reaction is the

A material that increases the rate of a chemical reaction by lowering the activation energy is called a(n)

Which of the following is the best evidence for a chemical reaction?

You can balance a chemical equation by changing the

A chemical reaction in which two elements combine to form a compound is called a

The scientist found that 2 grams of hydrogen reacted completely with 16 grams of oxygen. What was the total mass of water produced?

Salt water is an example of

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