Boron forms a variety of unusual compounds with hydrogen. A chemist isolated 6.3 mg of one of the boron hydrides in a glass buib with a volume a 385 mL at 25.0 °C and a bulb pressure of 11 torr. Which of the following is likely to be its molecular formula: BHs, ByH BaHp?

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Q: Which one is smaller?    Mg or Sr

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A: We have to define relative abundance.

Q: Where does the 2.303 comes from

A: The multiplier 2.303 comes from the conversion of ln or loge to log10 .

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A: Water has many properties that makes it important part of life like universal solvent, high heat…

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A: A question based on electrochemical series, which is to be accomplished.

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A:

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A: We have to predict the product or products are likely to be formed as follows in step 2:

Q: If pKa = 2.96 then Ka

A: Given: The value of pKa is 2.96 Ka is the acid dissociation constant

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A: The term macroscopic refers to the objects that can be seen by the naked eyes. Macroscopic is just…

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Q: Calculate the amount of material remaining for each of the following substances.

A:

Q: X-rays damage biological molecules. O True O False

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.