Which of the following is not evidence of a chemical change?

To produce salt, sodium (Na) and chlorine (Cl) are chemically combine to form NaCl. Which of the following best describes Na and Cl?

What elements are present in the compound methane (NH4)?

How many atoms make up the compound sodium acetate (C2H3NaO2)?

What law state that the mass of the reactants must equal the mass of the products?

Which equation below correctly shows the law of conservation of mass?

Which of the following properties is not a physical property?

A substance has several different atoms of several different elements that can be easily separated. What is being described?

Which of the following is not an example of a chemical change?

During a chemical reaction, heat is given off. What type of reaction occurs?

H20 is an example of a _________.

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