A 3.53-gg sample of aluminum completely reacts with oxygen to form 6.67 gg of aluminum oxide. Use these data to calculate the mass percent composition of aluminum in aluminum oxide. Express the percent composition to three significant figures

Q: 4. AB,(aq) + Nz,L(aq) – > NzB(aq) + AL(aq) 5. AZ4(8) + Q2(8) -- > Z,Q(1) + AO½(s) 2 of 2 Law of…

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Q: A 2.45 g sample of magnesium completely reacts with oxygen to form 4.06 g of magnesium oxide. Use…

A: Given : Mass of Mg = 2.45g Mass of MgO = 4.06g

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Q: Given the data below, calculate the mass of copper in the original sample. Mass of original sample…

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A: We are given mass of flask = 58.97g  Mass of flask + solid = 135.91g  We have to find mass of solid

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Q: Determine the number of CH;Clz molecules in 25.0 g CH;Clz. a) 0.294 molecules c) 1.28 x 1027…

A: Number of moles of CH2Cl2  is equal to the mass of CH2Cl2 divided by its molar mass.

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Q: Mixtures and compounds vary in composition with the latter having a 1) compound. The components of a…

A: A mixture is a physical combination of two or more substances. For example, water and salt.

Q: You have a sample of soil. Soil is a heterogeneous mixture. You separate the different size…

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A: NOTE

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Q: Make the following conversions: 1. 62.13 kg of Al to moles 2. 0.0235 moles of sugar, C,H,,O,, to…

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Q: what mass of anhydrous magnesium sulfate will remain?

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Q: 0.848g of Na2B4O7.10H2O into a crucible. After hearing the sample for a short time and allowing the…

A: Na2B4O7.10H2O is known as borax.It is a hydrated crystal having 10molecules of water of…

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Q: 2 Zn + Pb(NO3)4 = Pb + Zn(NO3)2 determine the amount of lead, Pb, in kilograms, which can be…

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Q: Determine the mass of the product from the following data.    Mass Aluminum Foil (g)      2.5415…

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Q: A sample of a compound has a mass of 41.13g. The sample is found to contain 37.28g of carbon and…

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Q: An 8.53 mg sample contains 1.72 mg of phosphorous.  What is the mass percentage of phosphorous in…

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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.