When dissolved beryllium chloride reacts with dissolved silver nitrate in water, aqueous beryllium nitrate and silverchloride powder are made.

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:

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

Final answer:

Atoms with low ionization energy form positive ions or cations more easily than atoms with high ionization energy due to less energy being required to remove an electron from the atom's valence shell.

Explanation:

The ease at which an atom forms a positive ion, also known as a cation, depends on its ionization energy. Ionization energy is the minimum amount of energy required to remove an electron from an atom in its ground state.

An atom with a low ionization energy will form a cation more readily than an atom with a high ionization energy. This is because it takes less energy to remove an electron from the atom's valence shell. On the other hand, atoms with a high ionization energy hold their electrons more tightly, thus it requires more energy to form a cation. This is seen in the trend across the periodic table where ionization energy increases across a period and decreases down a group due to the size and energy of the orbitals.

Sometimes, successive ionization energies or the energy necessary to remove subsequent electrons from an atom increase because core electrons, which are closer to the nucleus and thus experience a strong electrostatic attraction, are harder to remove than valence electrons.

Learn more about Ionization Energy here:

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The mould and cast fossil is Option B.

The carbon film fossil is Option C.

The Amber fossil is Option A.

The ice fossil is Option D.

Explanation:

Mould and cast fossils are formed when an organism or any organic object gets buried inside sediment and gets decomposed off, leaving an empty space between the sediments which are occupied by different minerals like carbon, calcium, silica etc. Thus, this mineral takes the shape of that decomposed object and stays for years.

The carbon film fossils are those fossils which take long time to form and are difficult to recover as well. They are formed when some organic substance gets very deep into Earth's surface and gets burned by the interior lava into only a thin layer of carbon.

The amber fossils are very common which are formed when the living organisms get stuck in plant resins and dies, which are enclosed into the plant's resin and are recovered thousands of years after.

The ice fossils aren't actually fossil because in very cold regions, the dead bodies often don't decompose but remain as it is for years. Thus the soft tissues are also recoverable after many years.

Answer;

-To provide an overview of the information the graph contains and also give an indication of the data being looked at.

Explanation;

- It is important to title graphs carefully so the information makes sense and the graph is easy to read and understand.

-The general title of a graph should provide an overview of the information it contains and give the readers an indication of the data they will be looking at.