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. similarly, 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.
9
concrete
water
homogeneous
sugar + pure water
(c₁₂h₂₂o₁₁ + h₂o)
iron filings (fe)
limestone (caco₃)
orange juice (w/pulp)
pacific ocean
air inside a balloon
aluminum (al)
magnesium (mg)
acetylene (c₂h₂)
tap water in a glass
soil
pure water (h₂o)
chromium (cr)
chex mix
salt + pure water
(nacl + h₂o)
benzene (c₆h₆)
muddy water
brass
(cu mixed with zn)
baking soda (nahco₃)

Question

Accepted Answer

# Explanation:
## Concrete
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Heterogeneous (it has visible different components like cement, sand, gravel etc.)

## Sugar + pure water ($C_{12}H_{22}O_{11}+H_{2}O$)
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Homogeneous (sugar dissolves uniformly in water)

## Iron filings (Fe)
- **Pure Substance or Mixture**: Pure Substance
- **Further Classification**: Element (it is made of only iron atoms)

## Limestone ($CaCO_{3}$)
- **Pure Substance or Mixture**: Pure Substance
- **Further Classification**: Compound (it is made of calcium, carbon and oxygen chemically combined)

## Orange juice (w/pulp)
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Heterogeneous (the pulp is not uniformly distributed)

## Pacific Ocean
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Homogeneous (for the most part, the dissolved salts etc. are uniformly distributed at a large - scale, ignoring large - scale currents etc. for basic classification)

## Air inside a balloon
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Homogeneous (gases like nitrogen, oxygen etc. are uniformly mixed)

## Aluminum (Al)
- **Pure Substance or Mixture**: Pure Substance
- **Further Classification**: Element (it is made of only aluminum atoms)

## Magnesium (Mg)
- **Pure Substance or Mixture**: Pure Substance
- **Further Classification**: Element (it is made of only magnesium atoms)

## Acetylene ($C_{2}H_{2}$)
- **Pure Substance or Mixture**: Pure Substance
- **Further Classification**: Compound (it is made of carbon and hydrogen chemically combined)

## Tap water in a glass
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Homogeneous (dissolved minerals etc. are uniformly distributed)

## Soil
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Heterogeneous (it has different components like minerals, organic matter, water etc. not uniformly distributed)

## Pure water ($H_{2}O$)
- **Pure Substance or Mixture**: Pure Substance
- **Further Classification**: Compound (it is made of hydrogen and oxygen chemically combined)

## Chromium (Cr)
- **Pure Substance or Mixture**: Pure Substance
- **Further Classification**: Element (it is made of only chromium atoms)

## Chex mix
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Heterogeneous (it has different components like cereals, pretzels etc. not uniformly distributed)

## Salt + pure water ($NaCl + H_{2}O$)
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Homogeneous (salt dissolves uniformly in water)

## Benzene ($C_{6}H_{6}$)
- **Pure Substance or Mixture**: Pure Substance
- **Further Classification**: Compound (it is made of carbon and hydrogen chemically combined)

## Muddy water
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Heterogeneous (mud particles are not uniformly distributed)

## Brass (Cu mixed with Zn)
- **Pure Substance or Mixture**: Mixture
- **Further Classification**: Homogeneous (it is an alloy, a solid - solution where copper and zinc are uniformly mixed at an atomic level)

## Baking soda ($NaHCO_{3}$)
- **Pure Substance or Mixture**: Pure Substance
- **Further Classification**: Compound (it is made of sodium, hydrogen, carbon and oxygen chemically combined)

# Answer:
| Material | Pure Substance or Mixture | Element, Compound, Homogeneous, Heterogeneous |
|---|---|---|
| concrete | Mixture | Heterogeneous |
| sugar + pure water ($C_{12}H_{22}O_{11}+H_{2}O$) | Mixture | Homogeneous |
| iron filings (Fe) | Pure Substance | Element |
| limestone ($CaCO_{3}$) | Pure Substance | Compound |
| orange juice (w/pulp) | Mixture | Heterogeneous |
| Pacific Ocean | Mixture | Homogeneous |
| air inside a balloon | Mixture | Homogeneous |
| aluminum (Al) | Pure Substance | Element |
| magnesium (Mg) | Pure Substance | Element |
| acetylene ($C_{2}H_{2}$) | Pure Substance | Compound |
| tap water in a glass | Mixture | Homogeneous |
| soil | Mixture | Heterogeneous |
| pure water ($H_{2}O$) | Pure Substance | Compound |
| chromium (Cr) | Pure Substance | Element |
| Chex mix | Mixture | Heterogeneous |
| salt + pure water ($NaCl + H_{2}O$) | Mixture | Homogeneous |
| benzene ($C_{6}H_{6}$) | Pure Substance | Compound |
| muddy water | Mixture | Heterogeneous |
| brass (Cu mixed with Zn) | Mixture | Homogeneous |
| baking soda ($NaHCO_{3}$) | Pure Substance | Compound |

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QUESTION IMAGE

Question

Explanation:

Concrete

Sugar + pure water ($C_{12}H_{22}O_{11}+H_{2}O$)

Iron filings (Fe)

Limestone ($CaCO_{3}$)

Orange juice (w/pulp)

Pacific Ocean

Air inside a balloon

Aluminum (Al)

Magnesium (Mg)

Acetylene ($C_{2}H_{2}$)

Tap water in a glass

Soil

Pure water ($H_{2}O$)

Chromium (Cr)

Chex mix

Salt + pure water ($NaCl + H_{2}O$)

Benzene ($C_{6}H_{6}$)

Muddy water

Brass (Cu mixed with Zn)

Baking soda ($NaHCO_{3}$)

Answer:

Material	Pure Substance or Mixture	Element, Compound, Homogeneous, Heterogeneous
sugar + pure water ($C_{12}H_{22}O_{11}+H_{2}O$)	Mixture	Homogeneous
iron filings (Fe)	Pure Substance	Element
limestone ($CaCO_{3}$)	Pure Substance	Compound
orange juice (w/pulp)	Mixture	Heterogeneous
Pacific Ocean	Mixture	Homogeneous
air inside a balloon	Mixture	Homogeneous
aluminum (Al)	Pure Substance	Element
magnesium (Mg)	Pure Substance	Element
acetylene ($C_{2}H_{2}$)	Pure Substance	Compound
tap water in a glass	Mixture	Homogeneous
soil	Mixture	Heterogeneous
pure water ($H_{2}O$)	Pure Substance	Compound
chromium (Cr)	Pure Substance	Element
Chex mix	Mixture	Heterogeneous
salt + pure water ($NaCl + H_{2}O$)	Mixture	Homogeneous
benzene ($C_{6}H_{6}$)	Pure Substance	Compound
muddy water	Mixture	Heterogeneous
brass (Cu mixed with Zn)	Mixture	Homogeneous
baking soda ($NaHCO_{3}$)	Pure Substance	Compound