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?

Q: a. Br2(l) is    what  in C6H6(l) b. C8H18(l) is  what  in C6H6(l) c. AgCl(s) is    what  in…

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Q: . C. 6. . 6. . S. .. .. _H3PO4 + КОН → K+ _B₂O3 → HCI + NaOH → C + Na + NaOH + Rb + _C6H6 + S8 → _O₂…

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Q: (d) 3.205 x 10³ nm to mi

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Q: lead + oxygen → ……………………………...……oxide

A: Lead + Oxygen → ______________________oxide

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A: The question is based on the concept of law of mass action. we need to write proper equation for law…

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Q: Choose an element (1) (Except Hydrogen) Define its isotopes and its uses and it must be inclined…

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Q: Rx lithium carbonate 300mg  Dispense #60  Sig: take 1 capsule by mouth 4 times a day  How many…

A: Mass of lithium carbonate in the tablet =  300mg  Patient has to take 1 capsule by mouth 4 times a…

Q: Which one is smaller?    Mg or Sr

A: Atomic number of Mg = 12  Atomic number of Sr = 38

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Q: c) What is the distance between adjacent (010) planes in Ag?

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Q: Define Relative abundance

A: We have to define relative abundance.

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Q: Where does the 2.303 comes from

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

Q: a. 13538) b 4513) C. 45.3) d 4.130

A:

Q: Cite 3 scientists whose works were mostly on the development of the periodic table. Give a short…

A: The arrangement of the elements in rows and column on the basis of their atomic number is termed as…

Q: 5. What are the properties of water that make it important for life? The substances that we are…

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

Q: Use the References to access important values if needed for this question. 1A 8A H 2A 3A 4A SA 6A 7A…

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Q: 1.65640 НО

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Q: Br BUL, DMF

A: Information of question

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Q: 2) OH (е) ationoy (d) (f)

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Q: In oxidation, a substance ……………………………………           A. Loses and gains electrons B. Gains…

A: Oxidation is a process of reaction

Q: Indicate which is larger in each of the following two sets. (1) Ni²+ or Ni (II) Te²- or Te

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Q: 6. Explain the hazard identification system briefly.

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Q: 4. Li (s) + Cr2(SO4)3 (aq) > 5. Mg (s) + FESO (aq)> Al (s) + NISO (aq)> 6.

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Q: CrO, но H,0* .CI OH CI 1. DMSO, 2. Et,Cl

A: Given reactions are oxidation reaction of primary alcohols.

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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Q: Object A has a charge of 3.6 × 10 °C and object B has a charge of 4.7 × 10 °C. What is the electric…

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Q: (d) the ion with 74 electrons, 116 neutrons, and a +3 charge

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Q: (d) Sb + He → I + ? 121 124 (e) 241 Am +'B → 4¿n+? 95 3° Cf + ? → 103L + 3 ¿n 259 98

A: Complete the following nuclear reaction ---

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

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

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Q: 8 8 L

A: According to the pictures given the state of the atoms and purity are described below-

Q: which of the following best illustrates a water molecule?

A: H2O is a polar molecule

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.