Which answer represents the correct chemical formulas for ammonium oxalate, calcium acetate,and magnesium sulfate heptahydrate. A. (NH4)2C2O4, Ca(CH3COO)2, MgSO4·6H2O B. NH4C2O4, Ca(CH3COO)2, MgSO3·6H2O C. (NH4)2C2O4, Ca(CH3COO)2, MgSO4·7H2O D. (NH4)2C2O4, CaCH3COO, MgSO4·6H2O E. NH4C2O4, CaCH3COO, MgSO4·7H2O   B) Cork has a density of about 0.60 g/cm3. Cork will partially float in water which has a densityof 1.0 g/cm3. If the piece of cork has a total volume of 5.0 cm3what volume of cork is BELOW thewater? A. 1.0 cm3 B. 1.5 cm3 C. 2.0 cm3 D. 2.5 cm3 E. 3.0 cm3   C) Let an n-protic acid be an acid that can donate n hydrogen ions and has the formula HnX. If 0.600 L of 0.400 M sodium hydroxide is required to titrate 0.400 L of a 0.300 M HnX to theequivalence point, what is n in HnX? A. 1 B. 2 C. 3 D. 4 E. 5

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Q: A chloride of rhenium contains 56.8% rhenium . What is the formula of this compound

A: Given: Percentage of rhenium = 56.8% Percentage of chlorine = (100-56.8)% = 43.2%

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Q: How is Na2S2O8 an empirical formula? Can’t that compound be simplified more?

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Q: Determine the quantity (g) of pure MgSO4 in 2.4 g of MgSO4•7H2O. Show your work.

A: Molar mass of MgSO4•7H2O = 246.47 g/molMolar mass of MgSO4 = 120.366 g/mol.

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A: Empirical formula represents the simplest ratio of the number of constituent atoms of a given…

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A:

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Q: What is the empirical formula of a compound composed of 30.9 g30.9 g of potassium (KK) and 6.32…

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A:

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A:

Q: The total number of atoms in Ca(OH)2

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A: Mass percent is the mass of the element divided by the mass of the compound or solute.

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A:

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A:

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A:

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A: Given,Unknown compound moles of  nitrogen = 4.33moles of Hydrogen = 8.6

Q: What is the empirical formula for a compound that contains 78.2% carbon, 6.57% hydrogen, and 15.2%…

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.