CHEMISTRY MIDDLE SCHOOL

PLZ HELP AND ILL GIVE YOU BRAINLIEST!!!Match each molecular formula to the corresponding empirical formula.

1) C4H8O2
2) C4H12O4
3) C2H10O2

A) CH3O
B) CH5O
C) C2H4O

Answers

Answer 1
Answer:

Answer:

1) C4H8O2 = C2H4O

2) C4H12O4 = CH3O

3) C2H10O2 = CH5O

Explanation:

  • The empirical formula is the formula that indicates the relative proportions of the elements in a molecule rather than the actual number of atoms of the elements. It tells us the simplest ratio of elements in a given compound.  
  • Molecular formula on the other hand tells us the actual number of atoms of each element a compound or a molecules has. Molecular formula is calculated from the empirical formula and the molecular mass of a compound.
Answer 2
Answer:

Answer:

C₄H₈O₂ = C₂H₄O  

C₄H₁₂O₄ = CH₃O

C₂H₁₀O₂ = CH₅O

Explanation:

1) C₄H₈O₂ = C₂H₄O  

The smallest subscript is 2. So dividing each subscript by 2 we get,

C₄/₂H₈/₂O₂/₂ = C₂H₄O

2) C₄H₁₂O₄ = CH₃O

The smallest subscript is 4. So dividing each subscript by 4 we get,

C₄/₄H₁₂/₄O₄/₄ = CH₃O

3) C₂H₁₀O₂ = CH₅O

The smallest subscript is 2. So dividing each subscript by 2 we get,

C₂/₂H₁₀/₂O₂/₂ = CH₅O

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How does the solubility of a gas change with increasing temperature

Answers

The definition of solubility is the maximum quantity of solute that can dissolve in a certain quantity of solvent or quantity of solution at a specified temperature or pressure (in the case of gaseous solutes). For Gases, solubility decreases as temperature increases (duh...you have seen water boil, right?) The physical reason for this is that when most gases dissolve in solution, the process is exothermic. This means that heat is released as the gas dissolves. This is very similar to the reason that vapor pressure increases with temperature. Increased temperature causes an increase in kinetic energy. The higher kinetic energy causes more motion in the gas molecules which break intermolecular bonds and escape from solution. Do you need any more?

Which substance cannot be decomposed by a chemical change? 1. HI
2. AlCl3
3. H2O
4. Cu

Answers

Final answer:

Among the substances listed, copper (Cu) is the one that can't be decomposed by a chemical change. This is because it is an element, composed of a single type of atom, and does not break down further in a chemical reaction.

Explanation:

The substance that cannot be decomposed by a chemical change among the given options is Cu, which stands for copper. In the context of chemistry, substances that cannot be decomposed into simpler substances by chemical means are called elements. Copper, denoted by the symbol Cu, is one such element. Unlike compounds such as HI, AlCl3, and H2O, elements like copper are composed of a single type of atom and therefore cannot be broken down further through chemical reactions.


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Final answer:

The substance that cannot be decomposed by a chemical change is Cu (Copper) because it is an element and cannot be broken down into simpler substances through chemical changes.

Explanation:

The substance among the options provided that cannot be decomposed by a chemical change is Cu or Copper. This is because Copper is an element, and elements are substances made up of only one type of atom. They cannot be broken down into simpler substances by chemical reactions. On the other hand, HI (Hydroiodic acid), AlCl3 (Aluminum chloride), and H2O (Water) are all compounds, which consist of two or more elements chemically combined in a fixed ratio. These can be decomposed into their constituent elements through various chemical reactions.

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Answers

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density (intensive)

volume (extensive)

mass (extensive)

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melting point (intensive): the temperature at which a substance melts.
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5. Melting/ Boiling point
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4. No Color Change (Except dyes)

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Answers

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Hey wademcelroy2005, thanks for submitting your question to Brainly!

The answer to your question is B:Radiation moves from a warmer object to a cooler object

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