Question

material, pure substance or mixture, element, compound, homogeneous, heterogeneous
limestone (caco₃), pure substance, compound: 2 or more elements
sugar water (c₁₂h₂₂o₁₁ + h₂o), mixture, homogeneous mixture
iron filings (fe), pure substance, element
concrete
orange juice with pulp
pacific ocean
air inside a balloon
aluminum (al)
magnesium (mg)
acetylene (c₂h₂)
tap water in a glass
soil
water (h₂o)
chromium (cr)
chex mix
salt + pure water (nacl + h₂o)
benzene (c₆h₆)
muddy water
brass (cu mixed with zn)
baking soda (nahco₃)
bronze copper, cu + tin, sn
pie dough

Explanation:

Step1: Recall definitions

Pure substances are either elements or compounds. Mixtures are combinations of substances. Homogeneous mixtures have uniform composition, heterogeneous mixtures have non - uniform composition.

Step2: Analyze concrete

Concrete is a mixture of cement, sand, gravel, and water. It is a heterogeneous mixture as the components are not uniformly distributed.

Step3: Analyze orange juice with pulp

Orange juice with pulp is a mixture. The pulp is not uniformly distributed, so it is a heterogeneous mixture.

Step4: Analyze Pacific Ocean

The Pacific Ocean is a mixture of water, salts, dissolved gases, and various suspended particles. It is a heterogeneous mixture due to non - uniform distribution of components like sediments in some areas.

Step5: Analyze air inside a balloon

Air inside a balloon is a mixture of nitrogen, oxygen, carbon dioxide, and other gases. It is a homogeneous mixture as the gases are uniformly distributed.

Step6: Analyze aluminum (Al)

Aluminum is a pure substance and an element as it consists of only aluminum atoms.

Step7: Analyze magnesium (Mg)

Magnesium is a pure substance and an element as it consists of only magnesium atoms.

Step8: Analyze acetylene (C₂H₂)

Acetylene is a pure substance and a compound as it is made up of carbon and hydrogen atoms chemically bonded together.

Step9: Analyze tap water in a glass

Tap water in a glass is a mixture. It contains water along with dissolved minerals and sometimes small amounts of other substances. It is often considered a homogeneous mixture if the dissolved substances are uniformly distributed.

Step10: Analyze soil

Soil is a mixture of minerals, organic matter, water, and air. It is a heterogeneous mixture due to the non - uniform distribution of its components.

Step11: Analyze water (H₂O)

Water is a pure substance and a compound as it is composed of hydrogen and oxygen atoms chemically bonded.

Step12: Analyze chromium (Cr)

Chromium is a pure substance and an element as it consists of only chromium atoms.

Step13: Analyze Chex mix

Chex mix is a mixture of different types of cereal, nuts, and seasonings. It is a heterogeneous mixture as the components are not uniformly distributed.

Step14: Analyze salt + pure water (NaCl + H₂O)

Salt + pure water is a mixture. When salt is dissolved in water, if well - mixed, it is a homogeneous mixture.

Step15: Analyze benzene (C₆H₆)

Benzene is a pure substance and a compound as it is made up of carbon and hydrogen atoms chemically bonded.

Step16: Analyze muddy water

Muddy water is a mixture. The mud particles are not uniformly distributed, so it is a heterogeneous mixture.

Step17: Analyze brass (Cu mixed with Zn)

Brass is a mixture of copper and zinc. It is a homogeneous mixture as the two metals are uniformly combined in an alloy.

Step18: Analyze baking soda (NaHCO₃)

Baking soda is a pure substance and a compound as it is composed of sodium, hydrogen, carbon, and oxygen atoms chemically bonded.

Step19: Analyze Bronze (Copper, Cu + tin, Sn)

Bronze is a mixture of copper and tin. It is a homogeneous mixture as the metals are uniformly combined in an alloy.

Step20: Analyze Pie dough

Pie dough is a mixture of flour, fat, water, and sometimes other ingredients. It is a heterogeneous mixture as the components may not be uniformly distributed.

Answer:

Material	Pure Substance or Mixture	Element, Compound, Homogeneous, Heterogeneous
orange juice with pulp	Mixture	Heterogeneous Mixture
Pacific Ocean	Mixture	Heterogeneous Mixture
air inside a balloon	Mixture	Homogeneous Mixture
aluminum (Al)	Pure Substance	Element
magnesium (Mg)	Pure Substance	Element
acetylene (C₂H₂)	Pure Substance	Compound
tap water in a glass	Mixture	Homogeneous Mixture
soil	Mixture	Heterogeneous Mixture
water (H₂O)	Pure Substance	Compound
chromium (Cr)	Pure Substance	Element
Chex mix	Mixture	Heterogeneous Mixture
salt + pure water (NaCl + H₂O)	Mixture	Homogeneous Mixture
benzene (C₆H₆)	Pure Substance	Compound
muddy water	Mixture	Heterogeneous Mixture
brass (Cu mixed with Zn)	Mixture	Homogeneous Mixture
baking soda (NaHCO₃)	Pure Substance	Compound
Bronze (Copper, Cu + tin, Sn)	Mixture	Homogeneous Mixture
Pie dough	Mixture	Heterogeneous Mixture