if it is a pure substance, state whether it is an element or a compound. if it is a mixture state whether it is homogeneous or a heterogeneous. remember: - pure substances have a fixed composition, and can be described with a single chemical formula. - mixtures have variable composition, and involve two or more substances physically combined.

| material (formula or ingredients listed) | is it a pure substance or mixture? | for pure substances is it an element or a compound? | for mixtures: is it homogeneous (solution) or heterogeneous (mechanical mixture, colloid, suspension) |
|--|--|--|--|
| lactose (c₁₂h₂₂o₁₁) | | | |
| sugar water (c₁₂h₂₂o₁₁ + h₂o) | | | |
| gold (au) | | | |
| pure ethanol (c₂h₅oh) | | | |
| dirt: (sand + humus + clay) | | | |
| sodium (na) | | | |
| filtered air h₂ + o₂ + n₂ + co₂ | | | |
| oxygen (o₂) | | | |
| fructose (c₆h₁₂o₆) | | | |
| pure water (h₂o) | | | |
| bottled water h₂o + dissolved minerals | | | |
| iced tea h₂o + dissolved tea | | | |
| chocolate chip ice cream cream, chocolate, etc. | | | |
| steel (alloy) (fe + c + cr) | | | |
| pure hydrochloric acid (hcl) | | | |
| dinitrogen monoxide (n₂o) | | | |
| sterling silver (alloy) 92.5% ag and 7.5% cu | | | |
| lotion (oil, water, wax, emulsifying agent) | | | |

Question

if it is a pure substance, state whether it is an element or a compound. if it is a mixture state whether it is homogeneous or a heterogeneous. remember: - pure substances have a fixed composition, and can be described with a single chemical formula. - mixtures have variable composition, and involve two or more substances physically combined.

Accepted Answer

# Explanation:
## Step1: Recall definitions
Pure substances have fixed - composition and can be described by a single chemical formula. Elements are made of one type of atom, and compounds are made of two or more different types of atoms chemically combined. Mixtures have variable composition and are physical combinations of substances. Homogeneous mixtures have uniform composition, and heterogeneous mixtures have non - uniform composition.
## Step2: Analyze lactose ($C_{12}H_{22}O_{11}$)
It has a fixed chemical formula, so it is a pure substance. It is made of carbon, hydrogen, and oxygen atoms chemically combined, so it is a compound.
## Step3: Analyze sugar water ($C_{12}H_{22}O_{11}+H_2O$)
It is a physical combination of sugar and water, so it is a mixture. It is a solution (uniform composition), so it is a homogeneous mixture.
## Step4: Analyze gold (Au)
It has a single - atom composition, so it is a pure substance and an element.
## Step5: Analyze pure ethanol ($C_2H_5OH$)
It has a fixed chemical formula, so it is a pure substance. It is made of carbon, hydrogen, and oxygen atoms chemically combined, so it is a compound.
## Step6: Analyze dirt (sand + humus+clay)
It is a physical combination of different substances with non - uniform composition, so it is a heterogeneous mixture.
## Step7: Analyze sodium (Na)
It has a single - atom composition, so it is a pure substance and an element.
## Step8: Analyze filtered air ($H_2 + O_2+N_2 + CO_2$)
It is a physical combination of different gases. It has a uniform composition (at the molecular level), so it is a homogeneous mixture.
## Step9: Analyze oxygen ($O_2$)
It has a single - type of atom (oxygen), so it is a pure substance and an element.
## Step10: Analyze fructose ($C_6H_{12}O_6$)
It has a fixed chemical formula, so it is a pure substance. It is made of carbon, hydrogen, and oxygen atoms chemically combined, so it is a compound.
## Step11: Analyze pure water ($H_2O$)
It has a fixed chemical formula, so it is a pure substance. It is made of hydrogen and oxygen atoms chemically combined, so it is a compound.
## Step12: Analyze bottled water ($H_2O$+dissolved minerals)
It is a physical combination of water and dissolved minerals. It has a uniform composition (the minerals are dissolved), so it is a homogeneous mixture.
## Step13: Analyze iced tea ($H_2O$+dissolved tea)
It is a physical combination of water and dissolved tea. It has a uniform composition (the tea is dissolved), so it is a homogeneous mixture.
## Step14: Analyze chocolate chip ice cream (Cream, chocolate, etc.)
It is a physical combination of different substances with non - uniform composition (you can see the chocolate chips), so it is a heterogeneous mixture.
## Step15: Analyze steel (alloy) ($Fe + C+Cr$)
It is a physical combination of iron, carbon, and chromium. It has a uniform composition at the microscopic level, so it is a homogeneous mixture.
## Step16: Analyze pure hydrochloric acid (HCl)
It has a fixed chemical formula, so it is a pure substance. It is made of hydrogen and chlorine atoms chemically combined, so it is a compound.
## Step17: Analyze dinitrogen monoxide ($N_2O$)
It has a fixed chemical formula, so it is a pure substance. It is made of nitrogen and oxygen atoms chemically combined, so it is a compound.
## Step18: Analyze sterling silver (alloy) (92.5% Ag and 7.5% Cu)
It is a physical combination of silver and copper. It has a uniform composition at the microscopic level, so it is a homogeneous mixture.
## Step19: Analyze lotion (oil, water, wax, emulsifying agent)
It is a physical combination of different substances. It has a uniform composition (it is an emulsion), so it is a homogeneous mixture.

# Answer:
| Material (formula or ingredients listed) | Is it a pure substance or mixture? | For pure substances: Is it an element or a compound? | For mixtures: Is it homogeneous (solution) or heterogeneous (mechanical mixture, colloid, suspension)? |
| ---- | ---- | ---- | ---- |
| lactose ($C_{12}H_{22}O_{11}$) | Pure substance | Compound | N/A |
| sugar water ($C_{12}H_{22}O_{11}+H_2O$) | Mixture | N/A | Homogeneous |
| gold (Au) | Pure substance | Element | N/A |
| pure ethanol ($C_2H_5OH$) | Pure substance | Compound | N/A |
| dirt (sand + humus+clay) | Mixture | N/A | Heterogeneous |
| sodium (Na) | Pure substance | Element | N/A |
| filtered air ($H_2 + O_2+N_2 + CO_2$) | Mixture | N/A | Homogeneous |
| oxygen ($O_2$) | Pure substance | Element | N/A |
| fructose ($C_6H_{12}O_6$) | Pure substance | Compound | N/A |
| pure water ($H_2O$) | Pure substance | Compound | N/A |
| bottled water ($H_2O$+dissolved minerals) | Mixture | N/A | Homogeneous |
| iced tea ($H_2O$+dissolved tea) | Mixture | N/A | Homogeneous |
| chocolate chip ice cream (Cream, chocolate, etc.) | Mixture | N/A | Heterogeneous |
| steel (alloy) ($Fe + C+Cr$) | Mixture | N/A | Homogeneous |
| Pure hydrochloric acid (HCl) | Pure substance | Compound | N/A |
| dinitrogen monoxide ($N_2O$) | Pure substance | Compound | N/A |
| sterling silver (alloy) (92.5% Ag and 7.5% Cu) | Mixture | N/A | Homogeneous |
| Lotion (oil, water, wax, emulsifying agent) | Mixture | N/A | Homogeneous |

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Step1: Recall definitions

Step2: Analyze lactose ($C_{12}H_{22}O_{11}$)

Step3: Analyze sugar water ($C_{12}H_{22}O_{11}+H_2O$)

Step4: Analyze gold (Au)

Step5: Analyze pure ethanol ($C_2H_5OH$)

Step6: Analyze dirt (sand + humus+clay)

Step7: Analyze sodium (Na)

Step8: Analyze filtered air ($H_2 + O_2+N_2 + CO_2$)

Step9: Analyze oxygen ($O_2$)

Step10: Analyze fructose ($C_6H_{12}O_6$)

Step11: Analyze pure water ($H_2O$)

Step12: Analyze bottled water ($H_2O$+dissolved minerals)

Step13: Analyze iced tea ($H_2O$+dissolved tea)

Step14: Analyze chocolate chip ice cream (Cream, chocolate, etc.)

Step15: Analyze steel (alloy) ($Fe + C+Cr$)

Step16: Analyze pure hydrochloric acid (HCl)

Step17: Analyze dinitrogen monoxide ($N_2O$)

Step18: Analyze sterling silver (alloy) (92.5% Ag and 7.5% Cu)

Step19: Analyze lotion (oil, water, wax, emulsifying agent)

Answer:

material (formula or ingredients listed)	is it a pure substance or mixture?	for pure substances is it an element or a compound?	for mixtures: is it homogeneous (solution) or heterogeneous (mechanical mixture, colloid, suspension)
sugar water (c₁₂h₂₂o₁₁ + h₂o)
gold (au)
pure ethanol (c₂h₅oh)
dirt: (sand + humus + clay)
sodium (na)
filtered air h₂ + o₂ + n₂ + co₂
oxygen (o₂)
fructose (c₆h₁₂o₆)
pure water (h₂o)
bottled water h₂o + dissolved minerals
iced tea h₂o + dissolved tea
chocolate chip ice cream cream, chocolate, etc.
steel (alloy) (fe + c + cr)
pure hydrochloric acid (hcl)
dinitrogen monoxide (n₂o)
sterling silver (alloy) 92.5% ag and 7.5% cu
lotion (oil, water, wax, emulsifying agent)

Material (formula or ingredients listed)	Is it a pure substance or mixture?	For pure substances: Is it an element or a compound?	For mixtures: Is it homogeneous (solution) or heterogeneous (mechanical mixture, colloid, suspension)?
sugar water ($C_{12}H_{22}O_{11}+H_2O$)	Mixture	N/A	Homogeneous
gold (Au)	Pure substance	Element	N/A
pure ethanol ($C_2H_5OH$)	Pure substance	Compound	N/A
dirt (sand + humus+clay)	Mixture	N/A	Heterogeneous
sodium (Na)	Pure substance	Element	N/A
filtered air ($H_2 + O_2+N_2 + CO_2$)	Mixture	N/A	Homogeneous
oxygen ($O_2$)	Pure substance	Element	N/A
fructose ($C_6H_{12}O_6$)	Pure substance	Compound	N/A
pure water ($H_2O$)	Pure substance	Compound	N/A
bottled water ($H_2O$+dissolved minerals)	Mixture	N/A	Homogeneous
iced tea ($H_2O$+dissolved tea)	Mixture	N/A	Homogeneous
chocolate chip ice cream (Cream, chocolate, etc.)	Mixture	N/A	Heterogeneous
steel (alloy) ($Fe + C+Cr$)	Mixture	N/A	Homogeneous
Pure hydrochloric acid (HCl)	Pure substance	Compound	N/A
dinitrogen monoxide ($N_2O$)	Pure substance	Compound	N/A
sterling silver (alloy) (92.5% Ag and 7.5% Cu)	Mixture	N/A	Homogeneous
Lotion (oil, water, wax, emulsifying agent)	Mixture	N/A	Homogeneous