Cyanocobalamin( vitamin B12) contains 4.34% cobalt by mass. what is the ,olar mass of cyanocobalamin, assuming that there is one atom of cobalt in every molecule?

Q: What is a mole of a substance? O alaboratory spoon full of a substance O The amount of a substance…

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Q: Write the empirical formulas of ionic compounds, given thecharges of their component ions?

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A: Since you have posted multiple questions, we are entitled to answer the first only.

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A: Given,

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Q: What is the molar mass of cholesterol if 0.00105 mol hasa mass of 0.406 g?

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Q: Ascorbic acid (CH,O,) is also known as Vitamin C. What quantity in molecules of CH,O, does a Vitamin…

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Q: Given : 2NaHCO3-->Na2CO3 +H2CO3  Molar mass NaHCO3 is 84.01g/mol Molar mass of Na2CO3 is…

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Q: Mass % of N in dinitrogen trioxide

A: The chemical formula of diniteogen trioxide is N2O3. The molar mass of N2O3=[(2×14)+(3×16)] = 76…

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Q: d. How many grams of phosphorus pentachloride are theoretically produced? If 0.450g of phosphorus…

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Q: What advantage is there to using a counting unit (the mole) inchemistry rather than a mass unit?

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A: Avogadro number = 6.02×1023

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A: Mass of LiOH = 1kg

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Q: Question attached

A: the overall charge on a compound is guided by the charges of cation and anions.

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Q: in the laboratory, a student weighs out 0.0852 g of cobalt on balance. how many atoms of cobalt are…

A: We have 0.0852 g of Co , we have to calculate the atoms of cobalt in the sample.

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Q: Iron ore is impure, Fe2O3. When Fe2O3 is heated with an excess of carbon (coke), metallic iron and…

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Q: Mass % of H in ammonium bicarbonate

A: Answer: 6.38%

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Q: A hydrate of cobalt(II) chloride had a mass of 165.88 g before heating. After heating, the anhydrous…

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Q: What are the similarities in how formula weight and molar mass are calculated? A) Formula weight and…

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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.