Which statement best describes evidence that a chemical reaction occurs as a cake bakes?

How many atoms of each element are in one molecule of 2-heptanone?

CH₃C₄H₈COCH₃

A student is asked to conduct an investigation to explore PHYSICAL properties of matter. Which procedure BEST measures a physical property of the sample?

Researchers are investigating processes that happen during digestion. Which answer choice describes only a physical change during digestion?

Choose the properties listed below that are examples of CHEMICAL properties (**select all that apply):

Students were measuring physical properties of a metal substance in the lab. The students had to identify the type of metal that a metal cube was made of. The length of each side was 3.0 cm, and the mass was 270 grams. What property could the students identify with these observations?

Two solutions are mixed and react to produce the solid precipitate AgCl. The chemical reaction is shown by the balanced chemical equation

AgNO₃  +  NaCl -->  AgCl   +   NaNO₃

What happens to the total mass as the reaction takes place?

Select all examples of chemical changes.

Which property type can be measured without changing the composition of the substance being measured?

Drag each item to its correct classification as an element and compound.

Malleability is a ___________________ property that almost all metals share. Reacting with oxygen to form rust is an example of a __________________ property that some metals have, such as iron.

The equation below represents a chemical reaction that occurs in living cells.  

C₆H₁₂O₆   +   6O₂  ---> 6CO₂   + 6H₂O   +   energy

How many atoms are represented in the reactants of this equation?

Which of the following could be evidence of a chemical change?

Label the items as element, compound, homogeneous mixture, or heterogeneous mixture.