classify each of the materials below. in the center column, state whether the material is a pure substance or a mixture.
• if the material is a pure substance, further classify it as either an element or compound in the right - column.
• if the material is a mixture, further classify it as homogeneous or heterogeneous in the right column. write the entire word in each space to earn full credit.

| material | pure substance | element or compound | mixture | solution(homogeneous) or mechanical mixture (heterogeneous) |
|--|--|--|--|--|
| laundry detergent (contains white and blue crystals) | mixture | heterogeneous | | |
| sugar + pure water ($c_{12}h_{22}o_{11}+h_2o$) | pure substance | compound | | |
| iron filings (fe) | pure substance | element | | |
| limestone ($caco_3$) | pure substance | compound | | |
| orange juice (water and pulp) | mixture | homogeneous | | |
| pacific ocean (water and salt) | | | | |
| air | mixture | homogeneous | | |
| aluminum (al) | | | | |
| magnesium (mg) | | | | |
| acetylene ($c_2h_2$) | | | | |
| tap water in a glass | | | | |
| pure water ($h_2o$) | | | | |
| soil | | | | |
| chromium (cr) | | | | |
| baking soda ($nahco_3$) | | | | |
| salt + pure water ($nacl + h_2o$) | | | | |
| benzene ($c_6h_6$) | | | | |
| muddy water | | | | |
| brass (cu mixed with zn) | | | | |
| pizza | | | | |

Question

classify each of the materials below. in the center column, state whether the material is a pure substance or a mixture.
• if the material is a pure substance, further classify it as either an element or compound in the right - column.
• if the material is a mixture, further classify it as homogeneous or heterogeneous in the right column. write the entire word in each space to earn full credit.

| material | pure substance | element or compound | mixture | solution(homogeneous) or mechanical mixture (heterogeneous) |
|--|--|--|--|--|
| laundry detergent (contains white and blue crystals) | mixture | heterogeneous | | |
| sugar + pure water ($c_{12}h_{22}o_{11}+h_2o$) | pure substance | compound | | |
| iron filings (fe) | pure substance | element | | |
| limestone ($caco_3$) | pure substance | compound | | |
| orange juice (water and pulp) | mixture | homogeneous | | |
| pacific ocean (water and salt) | | | | |
| air | mixture | homogeneous | | |
| aluminum (al) | | | | |
| magnesium (mg) | | | | |
| acetylene ($c_2h_2$) | | | | |
| tap water in a glass | | | | |
| pure water ($h_2o$) | | | | |
| soil | | | | |
| chromium (cr) | | | | |
| baking soda ($nahco_3$) | | | | |
| salt + pure water ($nacl + h_2o$) | | | | |
| benzene ($c_6h_6$) | | | | |
| muddy water | | | | |
| brass (cu mixed with zn) | | | | |
| pizza | | | | |

Accepted Answer

# Explanation:
## Step1: Recall definitions
A pure substance has a fixed - composition, while a mixture has a variable composition. Elements are made of one type of atom, compounds are made of different types of atoms chemically combined. Homogeneous mixtures have uniform composition and appearance, heterogeneous mixtures have non - uniform composition and appearance.
## Step2: Analyze sugar + pure water
Sugar + pure water is a mixture (not a pure substance) because it is a combination of two substances. It is a homogeneous mixture (solution) as the sugar dissolves uniformly in water.
## Step3: Analyze orange juice (water and pulp)
Orange juice with water and pulp is a mixture. It is heterogeneous because the pulp is not uniformly distributed in the water.
## Step4: Analyze Pacific Ocean (Water and Salt)
The Pacific Ocean (water and salt) is a mixture. It is homogeneous as the salt is dissolved uniformly throughout the water in large amounts.
## Step5: Analyze aluminum (Al)
Aluminum (Al) is a pure substance and an element as it is made up of only aluminum atoms.
## Step6: Analyze magnesium (Mg)
Magnesium (Mg) is a pure substance and an element as it consists of only magnesium atoms.
## Step7: Analyze acetylene ($C_2H_2$)
Acetylene ($C_2H_2$) is a pure substance and a compound as it is made up of carbon and hydrogen atoms chemically bonded together.
## Step8: Analyze tap water in a glass
Tap water in a glass is a mixture as it contains dissolved minerals and other substances. It is usually considered homogeneous as these substances are dissolved uniformly.
## Step9: Analyze pure water ($H_2O$)
Pure water ($H_2O$) is a pure substance and a compound as it is made up of hydrogen and oxygen atoms chemically bonded.
## Step10: Analyze soil
Soil is a mixture. It is heterogeneous as it contains different components like sand, clay, organic matter etc. which are not uniformly distributed.
## Step11: Analyze chromium (Cr)
Chromium (Cr) is a pure substance and an element as it consists of only chromium atoms.
## Step12: Analyze baking soda ($NaHCO_3$)
Baking soda ($NaHCO_3$) is a pure substance and a compound as it is made up of sodium, hydrogen, carbon and oxygen atoms chemically bonded.
## Step13: Analyze salt + pure water ($NaCl + H_2O$)
Salt + pure water ($NaCl + H_2O$) is a mixture. It is homogeneous as the salt dissolves uniformly in water.
## Step14: Analyze benzene ($C_6H_6$)
Benzene ($C_6H_6$) is a pure substance and a compound as it is made up of carbon and hydrogen atoms chemically bonded.
## Step15: Analyze muddy water
Muddy water is a mixture. It is heterogeneous as the mud particles are not uniformly distributed in the water.
## Step16: Analyze brass (Cu mixed with Zn)
Brass (Cu mixed with Zn) is a mixture. It is homogeneous as it is an alloy where the copper and zinc are uniformly mixed at a microscopic level.
## Step17: Analyze pizza
Pizza is a mixture. It is heterogeneous as it contains different components like dough, cheese, toppings etc. which are not uniformly distributed.

# Answer:
| Material | Pure Substance / Mixture | Element or Compound / Solution(Homogeneous) or Mechanical mixture (Heterogeneous) |
|--|--|--|
| Laundry detergent (contains white and blue crystals) | Mixture | Heterogeneous |
| sugar + pure water ($C_{12}H_{22}O_{11}+H_2O$) | Mixture | Homogeneous |
| iron filings (Fe) | Pure Substance | Element |
| limestone ($CaCO_3$) | Pure Substance | Compound |
| orange juice (water and pulp) | Mixture | Heterogeneous |
| Pacific Ocean (Water and Salt) | Mixture | Homogeneous |
| air | Mixture | Homogeneous |
| aluminum (Al) | Pure Substance | Element |
| magnesium (Mg) | Pure Substance | Element |
| acetylene ($C_2H_2$) | Pure Substance | Compound |
| tap water in a glass | Mixture | Homogeneous |
| pure water ($H_2O$) | Pure Substance | Compound |
| soil | Mixture | Heterogeneous |
| chromium (Cr) | Pure Substance | Element |
| baking soda ($NaHCO_3$) | Pure Substance | Compound |
| salt + pure water ($NaCl + H_2O$) | Mixture | Homogeneous |
| benzene ($C_6H_6$) | Pure Substance | Compound |
| muddy water | Mixture | Heterogeneous |
| brass (Cu mixed with Zn) | Mixture | Homogeneous |
| pizza | Mixture | Heterogeneous |

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QUESTION IMAGE

Question

Explanation:

Step1: Recall definitions

Step2: Analyze sugar + pure water

Step3: Analyze orange juice (water and pulp)

Step4: Analyze Pacific Ocean (Water and Salt)

Step5: Analyze aluminum (Al)

Step6: Analyze magnesium (Mg)

Step7: Analyze acetylene ($C_2H_2$)

Step8: Analyze tap water in a glass

Step9: Analyze pure water ($H_2O$)

Step10: Analyze soil

Step11: Analyze chromium (Cr)

Step12: Analyze baking soda ($NaHCO_3$)

Step13: Analyze salt + pure water ($NaCl + H_2O$)

Step14: Analyze benzene ($C_6H_6$)

Step15: Analyze muddy water

Step16: Analyze brass (Cu mixed with Zn)

Step17: Analyze pizza

Answer:

material	pure substance	element or compound
sugar + pure water ($c_{12}h_{22}o_{11}+h_2o$)	pure substance	compound
iron filings (fe)	pure substance	element
limestone ($caco_3$)	pure substance	compound
orange juice (water and pulp)	mixture	homogeneous
pacific ocean (water and salt)
air	mixture	homogeneous
aluminum (al)
magnesium (mg)
acetylene ($c_2h_2$)
tap water in a glass
pure water ($h_2o$)
soil
chromium (cr)
baking soda ($nahco_3$)
salt + pure water ($nacl + h_2o$)
benzene ($c_6h_6$)
muddy water
brass (cu mixed with zn)
pizza