8 Gold can be flattened into an extremely thin sheet. The malleability of gold is due to the(I) radioactive decay, mode of the isotope An-19S
(2) proton-to-neutron ratio in an atom of gold
(3) nature of the bonds between gold atoms
(4) reactively of gold atoms

Explanation:

The wavenumber of absorption peaks in an infrared (IR) spectrum is related to the vibrational frequencies of chemical bonds within a molecule. Different functional groups and bond types exhibit characteristic wavenumbers in the IR spectrum. When ranking carbonyl groups in a compound by increasing wavenumber, you can consider the following principles:

1. Single bonds vibrate at lower wavenumbers than double bonds.

2. Carbon-oxygen double bonds (C=O) vibrate at higher wavenumbers than carbon-oxygen single bonds (C-O).

3. The presence of electron-withdrawing groups can increase the wavenumber of the carbonyl group.

Based on these principles, here's how you can rank the carbonyl groups in the compound from lowest to highest wavenumber:

1. Carbonyl group without any adjacent electron-withdrawing groups (lowest wavenumber): This carbonyl group, if it's surrounded by alkyl or other non-electron-withdrawing groups, will have the lowest wavenumber since it's less polar and experiences weaker stretching vibrations.

2. Carbonyl group with adjacent electron-withdrawing groups: If a carbonyl group is adjacent to electron-withdrawing groups (e.g., nitro groups, fluorine atoms, etc.), it will have a higher wavenumber. The presence of these groups increases the polarity and strength of the C=O bond, causing it to vibrate at a higher frequency.

3. Carbonyl group in a conjugated system: If a carbonyl group is part of a conjugated system (alternating single and double bonds), it will have the highest wavenumber. Conjugation enhances the electron delocalization and increases the wavenumber of the carbonyl group.

So, in summary, the ranking of carbonyl groups by increasing wavenumber in an IR spectrum would generally be: carbonyl without adjacent electron-withdrawing groups < carbonyl with adjacent electron-withdrawing groups < carbonyl in a conjugated system.

if you convert all of the following metrics to m^3. Then the first one is the largest number. I know this stuff did it last year

Answer:

a)  Lead

b) Below

Explanation:

a) ₂₁₀ Po⁸⁴ ⇒ α + ₂₀₈Pb⁸²

b) Acids are extremely corrosive substances, so they must be cleaned soon as possible because they can damage not only the furniture but also clothes and skin of the laboratory workers.

Before cleaning the polluted area with water, acids must be clean with towels in order to reduce the amount of acid.

The reaction between the acids and water are very explosive, they are exothermic reactions, that means that they increase the temperature of the area polluted and it can cause more damage. That's why the area must be cleaned with towel before add water.

Answer:

The correct answer is Option (2)- Burning up of fossil fuels

Explanation:

Fossils are the remnants of the ancient plants and animals that were buried millions of years ago. Those fuels that are made up of these fossilized matters are commonly termed as fossil fuel. For example, Petroleum, Coal and natural gas. These are the major source of energy.

These fossil fuels are limited in amount and are non-renewable sources of energy. These are exploited rapidly by human beings. This burning up of fossil fuels leads to the production of a large amount of Carbon dioxide (CO₂) gas that causes a significant impact on the atmosphere. The increase in the CO₂ content also leads to an increase in the global temperature of the earth.

In the last 100 years, the CO₂ level in the atmosphere has immensely increased.

Hence, the correct answer is option (2).