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Fractional distillation is a series of processes of evaporation and condensation at a number of points in a vertical column.

Molar mass of X(HCO3)2 = X+(1+12+(16*3))2=162 =X + (13+48)2=162 X + 122=162 X=162-122 X=40

Wood charcoal is used to decolourise sugar because it has a highly porous structure, providing a large surface area for adsorption. Therefore, it adsorbs coloured material from sugar.

The word element was first given by Rebert Boyle. It is defined as the simplest chemical substance that cannot be broken down during a chemical reaction

Law of conservation of mass was given by Antoine Lavoisier in 1744. According to this law, "Matter can neither be created nor destroyed in a chemical reaction".

Boyles law states that the volume of a given mass of gas is inversely proportional to pressure at constant temperature.

Hard water is water with high concentrations of dissolved ions, in particular calcium and magnesium ions

Hard water is water with high concentrations of dissolved ions, in particular calcium and magnesium ions

Boyles law states that the volume of a given mass of gas is inversely proportional to pressure at constant temperature.

The word "audacity" implies boldness or daring behaviour. To maintain the contrast in the sentence, we are looking for a word that represents the opposite of audacity, the word that contrasts with audacity is: A. cowardice So, the complete sentence would be: "Obi's family is known for their audacity, so one is surprised at his cowardice."

Let’s look at the contrast implied by "while"—this conjunction signals opposition or contrast. We need a word that contrasts with "careless." "Meticulous" means very careful and precise, which is the direct opposite of careless.

Stringent: Refers to something that is strict, precise, or severe. Lax: Refers to something that is not strict, loose, or lenient. Given that the law against armed robbery is described as stringent, the appropriate opposite to complete the sentence would be "lax," indicating that the law against smoking in public places is not as strict or severe.

The word "impede" means to hinder, obstruct, or slow down progress. In the context of the sentence, the statement contrasts the purpose of education with the idea of hindrance or restraint. The sentence conveys that education is not meant to prevent or impede progress but, instead, to facilitate or promote it. Option B, "impede," accurately captures the idea of creating obstacles or barriers, making it the most suitable choice for the intended meaning in the sentence.

The sentence expresses the idea that many people are giving undue attention to temporary or worldly matters, and this focus is negatively affecting another aspect. The missing word should represent the opposite or a contrasting aspect to "temporal" or worldly. Temporal refers to things that are related to time, temporary, or material. Spiritual represents matters related to the spirit, soul, or the non-material aspects of life, often associated with beliefs, values, and a sense of purpose. Therefore, the most suitable word to complete the sentence is "spiritual," as it contrasts with "temporal" and reflects the idea that people are neglecting spiritual aspects in favour of temporary or material concerns.

"Conservative" refers to an inclination to preserve existing conditions and institutions, or to limit change. It can also describe a cautious or moderate approach, especially in political or social matters. In this sentence, it suggests that one set of parents is more traditional or cautious in their views. On the other hand, the term "liberal" indicates an openness to new ideas, progress, and social reform. The sentence implies that the speaker's parents hold more progressive or open-minded views compared to the conservative views of the other parents.