classify each substance as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

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Answer 1

Iron: Chemical element with the atomic number 26, Water: Compound made up of hydrogen. Saltwater: Solution of salt in water, uniform composition, homogeneous mixture.

Soil: Soil is a mixture of organic and inorganic materials, such as rock fragments, minerals, water, air, and decomposed of dead plants and animals

Iron: Iron (Fe) is a chemical element with the atomic number 26. It is an element because it cannot be broken down into simpler substances by chemical means.

Water: Water is a chemical compound with the chemical formula H2O.

Saltwater: Saltwater is a solution of salt (NaCl) in water. In a saltwater solution, the salt is evenly dispersed in the water and the composition is uniform throughout the solution.

Soil: Soil is a mixture of organic and inorganic materials, such as rock fragments, minerals, water, air, and decomposed of dead plants and animals. Soil is a heterogeneous mixture because it contains different substances that are not evenly distributed and can be physically separted.

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Related Questions

I need help solving this chemical equation. Thank you. Step by step explanation of it also.

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Balance the following equation:

3Cu (s) + 8HNO₃ (aq) ⟶ 3Cu(NO₃)₂(aq) + 2NO (g) + 4H₂O (l)

Reaction equilibrium is a condition where the components of the reactants and reaction products remain in the system, in a state of equilibrium the rate of the reaction to the right is equal to the rate of the reaction to the left.

Cu → Cu²⁺ + 2e⁻ ⟶ Equation (1)

NO₃⁻ + 4H⁺ + 3e⁻ ⟶ NO + 2H₂O ⟶Equation (2)

Equation (1) × 3+ Equation (2) ×2(for equalising electrons)

3Cu ⟶ 3Cu²⁺ + 6e⁻

2NO₃⁻ + 8H⁺ + 6e⁻ ⟶ 2NO + 4H₂O

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3Cu + 2NO₃⁻+ 8H⁺ ⟶ 3Cu²⁺ + 2NO + 4H₂O

But 8H⁺ + 8NO₃⁻ ⟶ 8HNO₃

The 6 NO₃²⁻ combine with Cu²⁺

So, balanced equation is:

3Cu (s) + 8HNO₃ (aq) ⟶ 3Cu(NO₃)₂(aq) + 2NO (g) + 4H₂O (l)

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an automobile gasoline tank holds 40kg of gasoline. when gasoline burns, 140 of oxygen is consumed and carbon dioxide and water are produced. whats the total mass of carbon dioxide and water produced

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40 + 140 = 180 kg of water and carbon dioxide were created in total when gasoline burns.

How much fuel can a tank in a car hold?

An average gasoline tank holds 13 to 16 gallons. For instance, the fuel capacity of a Ford Focus is 13.5 gallons, that of an Elantra is 14, and that of a Mazda 3 ranges from 14.9 to 15.9 gallons, depending on the model.

Mass of gasoline plus mass of oxygen equals the combined mass of carbon dioxide and water produced.

combined mass of the water and carbon dioxide produced = 40 + 140 = 180 kg The chemical reaction will appear as follows:

the following equation: fuel + oxygen + carbon dioxide + water + heat

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