Identify the following as a physical property, a chemical property, a physical change, or chemical change: Ammonium dichromate is an orange, crystal.

Two samples of matter have been collected and the elemental composition was determined. Both samples were determined to contain carbon and oxygen. Evaluate the data collected for the two samples of matter shown below: Sample A                           Sample B 24.0 g C: 32.0 g O                             3.0 g C: 4.0 g O Are these two samples the same compound or are they different compounds? Explain your answer and support your answer with a Law.  Write in complete sentences for full credit. (4 points)

Identify the following as a physical property, a chemical property, a physical change, or chemical change: Iodine changed from a gas to a solid when cooled.

Evaluate the following chemical formula, Fe2(CO3) 3. How many total atoms are found in this compound?

Referring to the figure below: What is the physical state of the unknown substance at 100 oC?

What is the general name given to the type/class of matter that has 100% constant composition?

Identify the following as a metal, nonmetal or semimetal/metalloid:  carbon (C)

Identify the following as an element, compound, homogeneous mixture, or heterogeneous mixture: A magnet composed of Alnico alloy (Al, Ni, Co, Fe, & Cu)

What specific class of matter is a 3% hydrogen peroxide solution?

Based on the molecular diagram below, classify the type of change that is occurring.